JP5804938B2 - Ship resistance reduction device - Google Patents

Ship resistance reduction device Download PDF

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JP5804938B2
JP5804938B2 JP2011286546A JP2011286546A JP5804938B2 JP 5804938 B2 JP5804938 B2 JP 5804938B2 JP 2011286546 A JP2011286546 A JP 2011286546A JP 2011286546 A JP2011286546 A JP 2011286546A JP 5804938 B2 JP5804938 B2 JP 5804938B2
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air outlet
air
valve
control
flow path
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JP2013133076A (en
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小段　洋一郎
洋一郎 小段
千春 川北
千春 川北
真一 ▲高▼野
真一 ▲高▼野
信 川淵
信 川淵
広光 松本
広光 松本
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Mitsubishi Heavy Industries Ltd
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Priority to PCT/JP2012/053525 priority patent/WO2013099301A1/en
Priority to CN201280058260.3A priority patent/CN103958339A/en
Priority to KR1020147010382A priority patent/KR101599652B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • B63B2001/387—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes using means for producing a film of air or air bubbles over at least a significant portion of the hull surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Description

本発明は、空気吹き出しにより船体の摩擦抵抗を低減する船舶の空気潤滑に関する。   The present invention relates to air lubrication of a ship that reduces the frictional resistance of the hull by air blowing.

省エネルギー技術の一つとして、船体から水中に空気を吹き出して船体の摩擦抵抗を低減する船舶の空気潤滑が知られている。   As one of energy-saving techniques, ship air lubrication is known in which air is blown out from the hull into the water to reduce the frictional resistance of the hull.

特許文献１は、船舶の航行状況に応じて気体の噴出状態を制御できる船舶の摩擦抵抗低減方法を開示している。例えば、波高が所定値以上になったら気泡の噴出を停止し、所定値以下になったら気泡の噴出を開始する。或いは、あて舵量や斜航角に応じて気体の噴出方向を調整する。   Patent document 1 is disclosing the frictional resistance reduction method of the ship which can control the ejection state of gas according to the navigation condition of a ship. For example, when the wave height exceeds a predetermined value, the ejection of bubbles is stopped, and when the wave height falls below the predetermined value, the ejection of bubbles is started. Alternatively, the gas ejection direction is adjusted in accordance with the amount of steering and the tilt angle.

空気吹き出しにより船体の摩擦抵抗が低減されると、目標速力を維持するために必要なプロペラの駆動馬力が低減される。一方、空気を水中に吹き出すために動力が必要である。したがって、馬力低減量から空気吹き出し動力を差し引いたものとして定義される空気潤滑による正味の省エネ効果を高めることが重要である。   When the frictional resistance of the hull is reduced by the air blowing, the driving horsepower of the propeller necessary for maintaining the target speed is reduced. On the other hand, power is required to blow air into the water. Therefore, it is important to enhance the net energy saving effect by air lubrication, which is defined as the amount of horsepower reduction minus the air blowing power.

特開２０１０−２２８６７９号公報JP 2010-228679 A

本発明の目的は、船底近傍の水流がセンターラインに対して斜めの場合において空気潤滑による正味の省エネ効果が向上する船舶の抵抗低減装置、船舶、及び船舶の抵抗低減方法を提供することである。   An object of the present invention is to provide a ship resistance reduction device, a ship, and a ship resistance reduction method that improve the net energy saving effect by air lubrication when the water flow near the ship bottom is oblique to the center line. .

以下に、（発明を実施するための形態）で使用される番号を用いて、課題を解決するための手段を説明する。これらの番号は、（特許請求の範囲）の記載と（発明を実施するための形態）との対応関係を明らかにするために付加されたものである。ただし、それらの番号を、（特許請求の範囲）に記載されている発明の技術的範囲の解釈に用いてはならない。   The means for solving the problem will be described below using the numbers used in the (DETAILED DESCRIPTION). These numbers are added to clarify the correspondence between the description of (Claims) and (Mode for Carrying Out the Invention). However, these numbers should not be used to interpret the technical scope of the invention described in (Claims).

本発明の一の観点による船舶の抵抗低減装置（１０）は、船舶の船底（７）のセンターライン（ＣＬ）より左舷（５）及び右舷（６）の一方側に設けられた一方側第１空気吹出口（３１）と、前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口（３２）と、前記一方側第１空気吹出口に一方側第１流路（４１）を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路（４２）を介して空気を供給する空気供給装置（２０）と、前記一方側第１流路に設けられた一方側第１バルブ（５１）と、前記他方側第１流路に設けられた他方側第１バルブ（５２）と、制御装置（１１）とを具備する。前記制御装置は、第１制御と第２制御とを実行する。前記第１制御において、前記制御装置は、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持する。前記第２制御において、前記制御装置は、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持する。   The ship resistance reduction device (10) according to one aspect of the present invention is provided on the one side first provided on one side of the port (5) and starboard (6) from the center line (CL) of the ship bottom (7). One side of the air outlet (31), the other side first air outlet (32) provided on the other side of the port and starboard from the center line of the ship bottom, and the one side first air outlet An air supply device (20) for supplying air through the first flow path (41) and supplying air to the other first air outlet through the other first flow path (42); One side first valve (51) provided in the side first flow path, the other side first valve (52) provided in the other side first flow path, and a control device (11) are provided. The said control apparatus performs 1st control and 2nd control. In the first control, the control device holds the one-side first valve and the other-side first valve in an open state. In the second control, the control device holds the one-side first valve in an open state and the other-side first valve in a closed state.

上記抵抗低減装置は、前記船底の前記センターラインより前記一方側に設けられた一方側第２空気吹出口（３３）と、前記船底の前記センターラインより前記他方側に設けられた他方側第２空気吹出口（３４）と、前記一方側第２空気吹出口に接続された一方側第２流路（４３）と、前記一方側第２流路に設けられた一方側第２バルブ（５３）と、前記他方側第２空気吹出口に接続された他方側第２流路（４４）と、前記他方側第２流路に設けられた他方側第２バルブ（５４）とを更に具備する。前記空気供給装置は、前記一方側第２空気吹出口に前記一方側第２流路を介して空気を供給し、前記他方側第２空気吹出口に前記他方側第２流路を介して空気を供給する。前記一方側第２空気吹出口は、前記一方側第１空気吹出口より前記センターラインに近い。前記他方側第２空気吹出口は、前記他方側第１空気吹出口より前記センターラインに近い。前記制御装置は、水流（１００）が前記船舶の前記一方側から前記他方側へ流れるときに前記第２制御及び第３制御を実行する。前記制御装置は、前記船舶に対する水流の流入角（β）が第１角度のときに前記第１制御を実行する。前記水流の流入角が前記第１角度より大きい第２角度のときに前記第２制御を実行する。前記水流の流入角が前記第２角度より大きい第３角度のときに前記第３制御を実行する。前記第１制御において、前記制御装置は、前記一方側第２バルブ及び前記他方側第２バルブを開状態に保持する。前記第２制御において、前記制御装置は、前記一方側第２バルブ及び前記他方側第２バルブを開状態に保持する。前記第３制御において、前記制御装置は、前記一方側第１バルブ及び前記一方側第２バルブを開状態に前記他方側第１バルブ及び前記他方側第２バルブを閉状態に保持する。   The resistance reducing device includes a second air outlet (33) on one side provided on the one side from the center line on the ship bottom, and a second second air outlet provided on the other side from the center line on the ship bottom. An air outlet (34), a one-side second flow path (43) connected to the one-side second air outlet, and a one-side second valve (53) provided in the one-side second flow path And the other side second flow path (44) connected to the other side second air outlet and the other side second valve (54) provided in the other side second flow path. The air supply device supplies air to the one side second air outlet through the one side second flow path, and supplies air to the other side second air outlet through the other side second flow path. Supply. The one side second air outlet is closer to the center line than the one side first air outlet. The other side second air outlet is closer to the center line than the other side first air outlet. The control device performs the second control and the third control when the water flow (100) flows from the one side to the other side of the ship. The said control apparatus performs said 1st control, when the inflow angle ((beta)) of the water flow with respect to the said ship is a 1st angle. The second control is executed when the inflow angle of the water flow is a second angle larger than the first angle. The third control is executed when the inflow angle of the water flow is a third angle larger than the second angle. In the first control, the control device holds the one-side second valve and the other-side second valve in an open state. In the second control, the control device holds the one-side second valve and the other-side second valve in an open state. In the third control, the control device holds the one-side first valve and the one-side second valve in an open state and the other-side first valve and the other-side second valve in a closed state.

前記第１制御において、前記制御装置は、前記空気供給装置の総空気供給量を第１空気供給量に制御する。前記第２制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第１空気供給量より少ない第２空気供給量に制御する。   In the first control, the control device controls the total air supply amount of the air supply device to the first air supply amount. In the second control, the control device controls the total air supply amount of the air supply device to a second air supply amount that is smaller than the first air supply amount.

前記第１制御において、前記制御装置は、前記空気供給装置の総空気供給量を第１空気供給量に制御する。前記第２制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第１空気供給量より少ない第２空気供給量に制御する。前記第３制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第２空気供給量より少ない第３空気供給量に制御する。   In the first control, the control device controls the total air supply amount of the air supply device to the first air supply amount. In the second control, the control device controls the total air supply amount of the air supply device to a second air supply amount that is smaller than the first air supply amount. In the third control, the control device controls the total air supply amount of the air supply device to a third air supply amount that is smaller than the second air supply amount.

上記抵抗低減装置は、前記船底の前記センターラインより前記一方側に設けられた一方側第３空気吹出口（３５、３７）と、前記船底の前記センターラインより前記他方側に設けられた他方側第３空気吹出口（３６、３８）と、前記一方側第３空気吹出口に接続された一方側第３流路（４５、４７）と、前記一方側第３流路に設けられた一方側第３バルブ（５５、５７）と、前記他方側第３空気吹出口に接続された他方側第３流路（４６、４８）と、前記他方側第３流路に設けられた他方側第３バルブ（５６、５８）とを更に具備する。前記空気供給装置は、前記一方側第３空気吹出口に前記一方側第３流路を介して空気を供給し、前記他方側第３空気吹出口に前記他方側第３流路を介して空気を供給する。前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域（７ａ）に配置される。前記一方側第３空気吹出口及び前記他方側第３空気吹出口は前記船底の第２領域（７ｂ、７ｃ）に配置される。前記第２領域は前記第１領域より船尾（３）側に位置する。前記第１制御において、前記制御装置は、前記一方側第３バルブ及び前記他方側第３バルブを閉状態に保持する。前記第２制御において、前記制御装置は、前記一方側第３バルブを開状態に前記他方側第３バルブを閉状態に保持する。   The resistance reduction device includes one side third air outlet (35, 37) provided on the one side from the center line on the ship bottom, and the other side provided on the other side from the center line on the ship bottom. A third air outlet (36, 38), a one-side third flow path (45, 47) connected to the one-side third air outlet, and one side provided in the one-side third flow path The third valve (55, 57), the other third flow path (46, 48) connected to the other third air outlet, and the other third provided in the other third flow path. And valves (56, 58). The air supply device supplies air to the one side third air outlet through the one side third flow path, and supplies air to the other side third air outlet through the other side third flow path. Supply. The one side first air outlet and the other side first air outlet are arranged in the first region (7a) of the ship bottom. The one side third air outlet and the other side third air outlet are arranged in the second region (7b, 7c) of the ship bottom. The second area is located closer to the stern (3) than the first area. In the first control, the control device holds the one-side third valve and the other-side third valve in a closed state. In the second control, the control device holds the one-side third valve in an open state and the other-side third valve in a closed state.

上記抵抗低減装置は、前記船底の前記センターラインより前記一方側に設けられた一方側空気吹出回収口（６１、６３）と、前記船底の前記センターラインより前記他方側に設けられた他方側空気吹出回収口（６２、６４）とを更に具備する。前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域（７ａ）に配置される。前記一方側空気吹出回収口及び前記他方側空気吹出回収口は前記船底の第２領域（７ｂ）に配置される。前記第２領域は前記第１領域より船尾（３）側に位置する。前記制御装置が前記第２制御を実行するとき、前記他方側空気吹出回収口は水中から空気を回収し、前記一方側空気吹出回収口は前記他方側空気吹出回収口が回収した空気を水中に吹き出す。   The resistance reducing device includes one-side air outlet / recovery port (61, 63) provided on the one side from the center line of the ship bottom, and the other-side air provided on the other side from the center line of the ship bottom. And a blowout recovery port (62, 64). The one side first air outlet and the other side first air outlet are arranged in the first region (7a) of the ship bottom. The one side air outlet recovery port and the other side air outlet recovery port are arranged in the second region (7b) of the ship bottom. The second area is located closer to the stern (3) than the first area. When the control device executes the second control, the other side air outlet recovery port recovers air from the water, and the one side air outlet recovery port passes the air recovered by the other side air outlet recovery port into the water. Blow out.

前記一方側空気吹出回収口は前記一方側の舷側に沿って設けられる。前記他方側空気吹出回収口は前記他方側の舷側に沿って設けられる。   The one side air outlet collection port is provided along the one side ridge side. The said other side air blowing collection | recovery opening is provided along the said other heel side.

本発明の他の観点による船舶は、上記抵抗低減装置（１０）と、推進力を発生するプロペラ（８）とを具備する。   A ship according to another aspect of the present invention includes the resistance reduction device (10) and a propeller (8) that generates propulsion.

本発明の他の観点による船舶の抵抗低減方法は、船舶に対する水流の流入角（β）が第１角度のときに抵抗低減装置（１０）の第１制御を実行するステップと、前記水流の流入角が前記第１角度より大きい第２角度のときに前記抵抗低減装置の第２制御を実行するステップとを具備する。前記抵抗低減装置は、前記船舶の船底（７）のセンターライン（ＣＬ）より左舷（５）及び右舷（６）の一方側に設けられた一方側第１空気吹出口（３１）と、前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口（３２）と、前記一方側第１空気吹出口に一方側第１流路（４１）を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路（４２）を介して空気を供給する空気供給装置（２０）と、前記一方側第１流路に設けられた一方側第１バルブ（５１）と、前記他方側第１流路に設けられた他方側第１バルブ（５２）とを備える。前記第１制御を実行するステップにおいて、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持する。前記第２制御を実行するステップにおいて、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持する。   According to another aspect of the present invention, there is provided a ship resistance reduction method comprising: executing a first control of a resistance reduction device (10) when an inflow angle (β) of a water flow with respect to a ship is a first angle; Performing a second control of the resistance reducing device when the angle is a second angle greater than the first angle. The resistance reducing device includes a first air outlet (31) on one side provided on one side of the port (5) and starboard (6) from the center line (CL) of the ship bottom (7) of the ship, and the ship bottom. The other side first air outlet (32) provided on the other side of the port and starboard from the center line, and the one side first air outlet through the one side first flow path (41). An air supply device (20) for supplying air and supplying air to the other side first air outlet through the other side first flow path (42), and one provided in the one side first flow path A first side valve (51) and a second first valve (52) provided in the other first flow path. In the step of executing the first control, the one-side first valve and the other-side first valve are held open. In the step of executing the second control, the one-side first valve is kept open and the other-side first valve is kept closed.

本発明によれば、船底近傍の水流がセンターラインに対して斜めの場合において空気潤滑による正味の省エネ効果が向上する船舶の抵抗低減装置、船舶、及び船舶の抵抗低減方法が提供される。   ADVANTAGE OF THE INVENTION According to this invention, when the water flow near a ship bottom is diagonal with respect to a centerline, the ship's resistance reduction apparatus, ship, and ship resistance reduction method which improve the net energy saving effect by air lubrication are provided.

図１は、本発明の第１の実施形態に係る船舶の底面図である。FIG. 1 is a bottom view of a ship according to the first embodiment of the present invention. 図２は、第１の実施形態に係る抵抗低減装置の概略図である。FIG. 2 is a schematic diagram of the resistance reduction device according to the first embodiment. 図３は、船舶に対する水流の流入角の定義を示す。FIG. 3 shows the definition of the inflow angle of the water flow to the ship. 図４は、船底近傍の水流がセンターラインに平行のときに第１の実施形態に係る抵抗低減装置の空気吹出口の全部から空気を吹き出した場合において、吹き出された空気によって形成される空気層の概念図である。FIG. 4 shows an air layer formed by blown air when air is blown out from all of the air outlets of the resistance reduction device according to the first embodiment when the water flow near the ship bottom is parallel to the center line. FIG. 図５は、船底近傍の水流がセンターラインに対して斜めのときに第１の実施形態に係る抵抗低減装置の空気吹出口の全部から空気を吹き出した場合において、吹き出された空気によって形成される空気層の概念図である。FIG. 5 is formed by the blown air when air is blown from all of the air outlets of the resistance reduction device according to the first embodiment when the water flow in the vicinity of the ship bottom is inclined with respect to the center line. It is a conceptual diagram of an air layer. 図６は、船底近傍の水流がセンターラインに対して斜めのときに第１の実施形態に係る抵抗低減装置の空気吹出口の一部から空気を吹き出した場合において、吹き出された空気によって形成される空気層の概念図である。FIG. 6 is formed by air blown out when air is blown out from a part of the air outlet of the resistance reduction device according to the first embodiment when the water flow near the ship bottom is oblique to the center line. It is a conceptual diagram of an air layer. 図７は、第１の実施形態の変形例に係る船舶の船首部分の底面図である。FIG. 7 is a bottom view of a bow portion of a ship according to a modification of the first embodiment. 図８は、第１の実施形態の変形例に係る抵抗低減装置の概念図である。FIG. 8 is a conceptual diagram of a resistance reduction device according to a modification of the first embodiment. 図９は、本発明の第２の実施形態に係る船舶の底面図である。FIG. 9 is a bottom view of a ship according to the second embodiment of the present invention. 図１０は、第２の実施形態に係る抵抗低減装置の概念図である。FIG. 10 is a conceptual diagram of a resistance reduction device according to the second embodiment. 図１１は、船底近傍の水流がセンターラインに対して斜めのときに第２の実施形態に係る抵抗低減装置の空気吹出口から吹き出された空気によって形成される空気層の概念図である。FIG. 11 is a conceptual diagram of an air layer formed by the air blown from the air outlet of the resistance reduction device according to the second embodiment when the water flow in the vicinity of the ship bottom is inclined with respect to the center line. 図１２は、本発明の第３の実施形態に係る船舶の底面図である。FIG. 12 is a bottom view of a ship according to the third embodiment of the present invention. 図１３は、第３の実施形態に係る抵抗低減装置の概略図である。FIG. 13 is a schematic diagram of a resistance reduction device according to the third embodiment. 図１４は、船底近傍の水流がセンターラインに対して斜めのときに第３の実施形態に係る抵抗低減装置の空気吹出口から吹き出された空気によって形成される空気層の概念図である。FIG. 14 is a conceptual diagram of an air layer formed by the air blown from the air outlet of the resistance reduction device according to the third embodiment when the water flow in the vicinity of the ship bottom is inclined with respect to the center line. 図１５は、第３の実施形態の変形例に係る抵抗低減装置の概略図である。FIG. 15 is a schematic diagram of a resistance reduction device according to a modification of the third embodiment. 図１６は、第４の実施形態に係る船舶の底面図である。FIG. 16 is a bottom view of a ship according to the fourth embodiment. 図１７は、第４の実施形態に係る抵抗低減装置の概略図である。FIG. 17 is a schematic diagram of a resistance reduction device according to the fourth embodiment.

添付図面を参照して、本発明による船舶の抵抗低減装置、船舶、及び、船舶の抵抗低減方法を実施するための形態を以下に説明する。   DESCRIPTION OF EMBODIMENTS With reference to the accompanying drawings, embodiments for carrying out a ship resistance reduction device, a ship, and a ship resistance reduction method according to the present invention will be described below.

（第１の実施形態）
図１を参照して、本発明の第１の実施形態に係る船舶は、船体１と、プロペラ８と、舵９と、抵抗低減装置１０とを備える。船体１は、船首２と、船尾３と、左舷５と、右舷６と、船底７とを備える。船体１に対して縦方向（船首船尾方向）Ｘ及び横方向（船幅方向）Ｙが定義されている。プロペラ８及び舵９は、船尾３に設けられる。プロペラ８は、推進力を発生する。抵抗低減装置１０は、船底７に設けられた空気吹出口３０〜３２を備える。空気吹出口３０〜３２は船首２近傍に設けられている。空気吹出口３０は、センターラインＣＬ上に設けられている。空気吹出口３１は、センターラインＣＬより左舷５側に設けられている。空気吹出口３２は、センターラインＣＬより右舷６側に設けられている。空気吹出口３０〜３２の各々は、Ｙ方向に配列された複数の空気吹出孔又はＹ方向に延びるスリット孔から水中に空気を吹き出す。 (First embodiment)
Referring to FIG. 1, a ship according to a first embodiment of the present invention includes a hull 1, a propeller 8, a rudder 9, and a resistance reduction device 10. The hull 1 includes a bow 2, a stern 3, a port 5, a starboard 6, and a ship bottom 7. A vertical direction (forward stern direction) X and a horizontal direction (ship width direction) Y are defined for the hull 1. The propeller 8 and the rudder 9 are provided on the stern 3. The propeller 8 generates a driving force. The resistance reduction device 10 includes air outlets 30 to 32 provided on the ship bottom 7. The air outlets 30 to 32 are provided in the vicinity of the bow 2. The air outlet 30 is provided on the center line CL. The air outlet 31 is provided on the port 5 side from the center line CL. The air outlet 32 is provided on the starboard 6 side from the center line CL. Each of the air outlets 30 to 32 blows air into the water from a plurality of air outlet holes arranged in the Y direction or slit holes extending in the Y direction.

抵抗低減装置１０が船舶の航行中に空気を水中に吹き出す。抵抗低減装置１０が吹き出した空気によって形成される空気層（気泡層）によって船底７の表面が覆われるため、船体１の摩擦抵抗が低減される。そのため、目標速力を維持するために必要なプロペラ８の駆動馬力が低減される。   The resistance reducing device 10 blows air into the water while the ship is sailing. Since the surface of the ship bottom 7 is covered with an air layer (bubble layer) formed by the air blown out by the resistance reducing device 10, the frictional resistance of the hull 1 is reduced. For this reason, the driving horsepower of the propeller 8 necessary for maintaining the target speed is reduced.

図２を参照して、抵抗低減装置１０は、上述の空気吹出口３０〜３２に加えて、空気供給装置２０と、流路４０〜４２と、バルブ５０〜５２と、制御装置１１と、水流の流入角検出装置１５とを備える。   With reference to FIG. 2, the resistance reduction device 10 includes an air supply device 20, flow paths 40 to 42, valves 50 to 52, a control device 11, a water flow, in addition to the air outlets 30 to 32 described above. The inflow angle detecting device 15 is provided.

空気供給装置２０は、コンプレッサ又はブロワのような空気を加圧して供給する装置である。空気供給装置２０は、大気圧の空気を加圧して供給する。流路４０は、空気供給装置２０と空気吹出口３０とを接続する。流路４１は、空気供給装置２０と空気吹出口３１とを接続する。流路４２は、空気供給装置２０と空気吹出口３２とを接続する。バルブ５０〜５２は、それぞれ、流路４０〜４２に設けられている。空気供給装置２０は、空気吹出口３０に流路４０を介して空気を供給し、空気吹出口３１に流路４１を介して空気を供給し、空気吹出口３２に流路４２を介して空気を供給する。空気吹出口３０〜３２は空気を水中に吹き出す。   The air supply device 20 is a device that pressurizes and supplies air such as a compressor or a blower. The air supply device 20 pressurizes and supplies atmospheric pressure air. The flow path 40 connects the air supply device 20 and the air outlet 30. The flow path 41 connects the air supply device 20 and the air outlet 31. The flow path 42 connects the air supply device 20 and the air outlet 32. The valves 50 to 52 are provided in the flow paths 40 to 42, respectively. The air supply device 20 supplies air to the air outlet 30 via the channel 40, supplies air to the air outlet 31 via the channel 41, and supplies air to the air outlet 32 via the channel 42. Supply. The air outlets 30 to 32 blow out air into the water.

水流の流入角検出装置１５は、船舶に対する水流の流入角βを検出する。水流の流入角βの定義は後述する。水流の流入角検出装置１５は、ジャイロ１６と、ドップラーソナー１７と、ＧＰＳ装置１８と、水流の流入角計算装置１９とを備える。ジャイロ１６は、船舶の船首方位αを検出する。ドップラーソナー１７は、船舶の対水船速ベクトルＶＷを検出する。ＧＰＳ装置１８は、船舶の対地船速ベクトルＶＧを検出する。水流の流入角計算装置１９は、船首方位α、対水船速ベクトルＶＷ、及び対地船速ベクトルＶＧの少なくとも一つに基づいて水流の流入角βを計算する。   The water flow inflow angle detection device 15 detects the water flow inflow angle β with respect to the ship. The definition of the water flow inflow angle β will be described later. The water flow inflow angle detection device 15 includes a gyro 16, a Doppler sonar 17, a GPS device 18, and a water flow inflow angle calculation device 19. The gyro 16 detects the heading α of the ship. The Doppler sonar 17 detects the ship's speed vector VW against water. The GPS device 18 detects a ship's ground speed vector VG. The water flow inflow angle calculation device 19 calculates the water flow inflow angle β based on at least one of the heading α, the water speed vector VW, and the ground speed vector VG.

制御装置１１は、水流の流入角βに基づいて、空気供給装置２０、及び、バルブ５０〜５２を制御する。   The control device 11 controls the air supply device 20 and the valves 50 to 52 based on the inflow angle β of the water flow.

図３を参照して、水流の流入角βは、センターラインＣＬに対する船底７近傍の水流１００の角度として定義されている。水流１００とセンターラインＣＬが平行に近いほど、水流の流入角βは小さい。水流の流入角βは、風、潮流、船舶の旋回運動などの影響を受ける。   With reference to FIG. 3, the inflow angle β of the water flow is defined as the angle of the water flow 100 in the vicinity of the ship bottom 7 with respect to the center line CL. The closer the water flow 100 and the center line CL are parallel, the smaller the inflow angle β of the water flow. The inflow angle β of the water current is affected by wind, tidal current, and turning motion of the ship.

以下、本実施形態に係る船舶の抵抗低減方法を説明する。   Hereinafter, the ship resistance reduction method according to the present embodiment will be described.

図４を参照して、水流１００がセンターラインＣＬと平行のとき、水流の流入角βは第１角度である。このとき、制御装置１１は第１制御を実行する。第１制御において、制御装置１１は、バルブ５０〜５２を開状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御する。空気吹出口３０〜３２の全部から空気が吹き出される。空気吹出口３０〜３２から吹き出された空気によって空気層（気泡層）１３０〜１３２が形成される。空気層１３０〜１３２によって船底７の大部分が覆われる。   Referring to FIG. 4, when the water flow 100 is parallel to the center line CL, the water flow inflow angle β is the first angle. At this time, the control device 11 executes the first control. In the first control, the control device 11 holds the valves 50 to 52 in an open state, and controls the total air supply amount of the air supply device 20 to the first air supply amount. Air is blown out from all of the air outlets 30 to 32. Air layers (bubble layers) 130 to 132 are formed by the air blown from the air outlets 30 to 32. Most of the bottom 7 is covered with the air layers 130 to 132.

図５を参照して、水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき、水流の流入角βは第１角度より大きい第２角度である。このとき、制御装置１１が第１制御を実行すると、水流１００の下流側に位置する空気吹出口３２から吹き出された空気によって形成される空気層１３２によって覆われる船底７の面積は非常に小さい。   Referring to FIG. 5, when the water flow 100 is inclined with respect to the center line CL and the water flow 100 flows from the port 5 to the starboard 6, the inflow angle β of the water flow is a second angle larger than the first angle. At this time, when the control device 11 executes the first control, the area of the ship bottom 7 covered by the air layer 132 formed by the air blown from the air outlet 32 located on the downstream side of the water flow 100 is very small.

図６を参照して、水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき（水流の流入角βは第２角度）のとき、制御装置１１は第２制御を実行する。第２制御において、制御装置１１は、バルブ５０及び５１を開状態にバルブ５２を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量より少ない第２空気供給量に制御する。空気吹出口３０及び３１から空気が吹き出されるが、水流１００の下流側に位置する空気吹出口３２から空気が吹き出されない。   Referring to FIG. 6, when water flow 100 is oblique with respect to center line CL and water flow 100 flows from port 5 to starboard 6 (water flow inflow angle β is the second angle), control device 11 2 Control is executed. In the second control, the control device 11 keeps the valves 50 and 51 open and the valve 52 closed, and sets the total air supply amount of the air supply device 20 to a second air supply amount that is smaller than the first air supply amount. Control. Air is blown out from the air outlets 30 and 31, but air is not blown out from the air outlet 32 located on the downstream side of the water flow 100.

ここで、図６の場合における馬力低減量は図５の場合における馬力低減量に比べて小さいが、空気吹出口３２から吹き出された空気によって形成される空気層１３２によって覆われる船底７の面積が非常に小さいため、馬力低減量の差は無視できる。一方、空気供給装置２０の総空気供給量が第１空気供給量から第２空気供給量に減少しているため、図６の場合における空気吹き出し動力は図５の場合における空気吹き出し動力に比べて小さい。したがって、図６の場合の方が図５の場合に比べて空気潤滑による正味の省エネ効果が優れている。   Here, the horsepower reduction amount in the case of FIG. 6 is smaller than the horsepower reduction amount in the case of FIG. 5, but the area of the ship bottom 7 covered by the air layer 132 formed by the air blown out from the air outlet 32 is small. The difference in horsepower reduction is negligible because it is very small. On the other hand, since the total air supply amount of the air supply device 20 is reduced from the first air supply amount to the second air supply amount, the air blowing power in the case of FIG. 6 is compared with the air blowing power in the case of FIG. small. Therefore, in the case of FIG. 6, the net energy saving effect by air lubrication is superior to the case of FIG.

尚、水流１００が右舷６から左舷５に流れる場合、制御装置１１は、バルブ５０及び５１を開状態にバルブ５２を閉状態に保持するかわりに、バルブ５０及び５２を開状態にバルブ５１を閉状態に保持する。   When the water flow 100 flows from the starboard 6 to the port 5, the control device 11 closes the valve 50 and 52 while opening the valve 50 and 51 instead of opening the valve 50 and 51 and holding the valve 52 closed. Keep in state.

（第１の実施形態の変形例）
図７を参照して、本発明の第１の実施形態の変形例に係る抵抗低減装置１０を説明する。本変形例に係る抵抗低減装置１０は、下記の点を除いて第１の実施形態に係る抵抗低減装置１０と同じである。本変形例に係る抵抗低減装置１０は、空気吹出口３３及び３４を備える。空気吹出口３３は、センターラインＣＬより左舷５側に設けられている。空気吹出口３３は、空気吹出口３１よりセンターラインＣＬに近い。空気吹出口３４は、センターラインＣＬより右舷６側に設けられている。空気吹出口３４は、空気吹出口３２よりセンターラインＣＬに近い。空気吹出口３３及び３４の各々は、Ｙ方向に配列された複数の空気吹出孔又はＹ方向に延びるスリット孔から水中に空気を吹き出す。 (Modification of the first embodiment)
With reference to FIG. 7, the resistance reduction apparatus 10 which concerns on the modification of the 1st Embodiment of this invention is demonstrated. The resistance reduction device 10 according to this modification is the same as the resistance reduction device 10 according to the first embodiment except for the following points. The resistance reduction device 10 according to this modification includes air outlets 33 and 34. The air outlet 33 is provided on the port 5 side with respect to the center line CL. The air outlet 33 is closer to the center line CL than the air outlet 31. The air outlet 34 is provided on the starboard 6 side from the center line CL. The air outlet 34 is closer to the center line CL than the air outlet 32. Each of the air outlets 33 and 34 blows air into the water from a plurality of air outlet holes arranged in the Y direction or slit holes extending in the Y direction.

図８を参照して、抵抗低減装置１０は、流路４３及び４４と、バルブ５３及び５４とを備える。流路４３は、空気供給装置２０と空気吹出口３３とを接続する。流路４４は、空気供給装置２０と空気吹出口３４とを接続する。バルブ５３及び５４は、それぞれ、流路４３及び４４に設けられている。空気供給装置２０は、空気吹出口３３に流路４３を介して空気を供給し、空気吹出口３４に流路４４を介して空気を供給する。空気吹出口３３及び３４は空気を水中に吹き出す。   Referring to FIG. 8, resistance reduction device 10 includes flow paths 43 and 44 and valves 53 and 54. The flow path 43 connects the air supply device 20 and the air outlet 33. The flow path 44 connects the air supply device 20 and the air outlet 34. The valves 53 and 54 are provided in the flow paths 43 and 44, respectively. The air supply device 20 supplies air to the air outlet 33 via the flow path 43 and supplies air to the air outlet 34 via the flow path 44. The air outlets 33 and 34 blow out air into the water.

制御装置１１は、水流の流入角βに基づいて、空気供給装置２０、及び、バルブ５０〜５４を制御する。   The control device 11 controls the air supply device 20 and the valves 50 to 54 based on the inflow angle β of the water flow.

以下、本変形例に係る船舶の抵抗低減方法を説明する。   Hereinafter, the ship resistance reduction method according to the present modification will be described.

水流の流入角βが第１角度のとき（水流１００がセンターラインＣＬと平行のとき）、制御装置１１は第１制御を実行する。第１制御において、制御装置１１は、バルブ５０〜５４を開状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御する。空気吹出口３０〜３４の全部から空気が吹き出される。   When the inflow angle β of the water flow is the first angle (when the water flow 100 is parallel to the center line CL), the control device 11 executes the first control. In the first control, the control device 11 holds the valves 50 to 54 in an open state, and controls the total air supply amount of the air supply device 20 to the first air supply amount. Air is blown out from all of the air outlets 30 to 34.

水流の流入角βが第１角度より大きい第２角度のとき（水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき）、制御装置１１は、第２制御を実行する。第２制御において、制御装置１１は、バルブ５０、５１、５３、及び５４を開状態にバルブ５２を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量より少ない第２空気供給量に制御する。空気吹出口３０、３１、３３、及び３４から空気が吹き出されるが、水流１００の最も下流側に位置する空気吹出口３２から空気が吹き出されない。   When the water flow inflow angle β is a second angle larger than the first angle (when the water flow 100 is oblique to the center line CL and the water flow 100 flows from the port 5 to the starboard 6), the control device 11 Execute control. In the second control, the control device 11 holds the valves 50, 51, 53, and 54 in the open state and the valve 52 in the closed state, and the total air supply amount of the air supply device 20 is smaller than the first air supply amount. Control to 2 air supply. Air is blown out from the air outlets 30, 31, 33, and 34, but air is not blown out from the air outlet 32 located on the most downstream side of the water flow 100.

水流の流入角βが第２角度より大きい第３角度のとき（水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき）、制御装置１１は、第３制御を実行する。第３制御において、制御装置１１は、バルブ５０、５１、及び５３を開状態にバルブ５２及び５４を閉状態に保持し、空気供給装置２０の総空気供給量を第２空気供給量より少ない第３空気供給量に制御する。空気吹出口３０、３１、及び３３から空気が吹き出されるが、水流１００の最も下流側に位置する空気吹出口３２とその隣の空気吹出口３４から空気が吹き出されない。   When the water flow inflow angle β is a third angle larger than the second angle (when the water flow 100 is oblique to the center line CL and the water flow 100 flows from the port 5 to the starboard 6), the control device 11 Execute control. In the third control, the control device 11 holds the valves 50, 51, and 53 in the open state and the valves 52 and 54 in the closed state, and the total air supply amount of the air supply device 20 is smaller than the second air supply amount. Control to 3 air supply. Air is blown out from the air outlets 30, 31, and 33, but air is not blown out from the air outlet 32 located on the most downstream side of the water flow 100 and the adjacent air outlet 34.

尚、水流１００が右舷６から左舷５に流れる場合、制御装置１１は、第２制御においてバルブ５０、５２、５３、及び５４を開状態にバルブ５１を閉状態に保持し、第３制御においてバルブ５０、５２、及び５４を開状態にバルブ５１及び５３を閉状態に保持する。   When the water flow 100 flows from the starboard 6 to the port 5, the control device 11 holds the valves 50, 52, 53, and 54 in the second state and keeps the valve 51 closed in the second control, and the valve in the third control. 50, 52, and 54 are kept open, and valves 51 and 53 are kept closed.

本変形例によれば、バルブ５１〜５４の開閉と空気供給装置２０の総空気供給量を水流の流入角βの大きさに応じて細かく制御することにより、空気潤滑による正味の省エネ効果を更に高めることができる。   According to this modification, the net energy saving effect by air lubrication is further improved by finely controlling the opening and closing of the valves 51 to 54 and the total air supply amount of the air supply device 20 according to the magnitude of the inflow angle β of the water flow. Can be increased.

（第２の実施形態）
図９を参照して、本発明の第２の実施形態に係る抵抗低減装置１０を説明する。本実施形態に係る抵抗低減装置１０は、下記の点を除いて第１の実施形態に係る抵抗低減装置１０と同じである。本実施形態に係る抵抗低減装置１０は、空気吹出口３５〜３８を備える。空気吹出口３０〜３２は、船底７の領域７ａに配置される。空気吹出口３５及び３６は、船底７の領域７ｂに配置される。空気吹出口３７及び３８は、船底７の領域７ｃに配置される。領域７ｂは、領域７ａより船尾３側に位置する。領域７ｃは、領域７ｂより船尾３側に位置する。空気吹出口３５及び３７は、センターラインＣＬより左舷５側に設けられている。空気吹出口３６及び３８は、センターラインＣＬより右舷６側に設けられている。空気吹出口３５〜３８の各々は、Ｙ方向に配列された複数の空気吹出孔又はＹ方向に延びるスリット孔から水中に空気を吹き出す。 (Second Embodiment)
With reference to FIG. 9, the resistance reduction apparatus 10 which concerns on the 2nd Embodiment of this invention is demonstrated. The resistance reduction device 10 according to the present embodiment is the same as the resistance reduction device 10 according to the first embodiment except for the following points. The resistance reduction device 10 according to the present embodiment includes air outlets 35 to 38. The air outlets 30 to 32 are disposed in the region 7 a of the ship bottom 7. The air outlets 35 and 36 are disposed in the region 7 b of the ship bottom 7. The air outlets 37 and 38 are disposed in the region 7 c of the ship bottom 7. The region 7b is located closer to the stern 3 than the region 7a. The region 7c is located closer to the stern 3 than the region 7b. The air outlets 35 and 37 are provided on the port 5 side from the center line CL. The air outlets 36 and 38 are provided on the starboard 6 side from the center line CL. Each of the air outlets 35 to 38 blows air into the water from a plurality of air outlet holes arranged in the Y direction or slit holes extending in the Y direction.

図１０を参照して、抵抗低減装置１０は、流路４５〜４８と、バルブ５５〜５８とを備える。流路４５は、空気供給装置２０と空気吹出口３５とを接続する。流路４６は、空気供給装置２０と空気吹出口３６とを接続する。流路４７は、空気供給装置２０と空気吹出口３７とを接続する。流路４８は、空気供給装置２０と空気吹出口３８とを接続する。バルブ５５〜５８は、それぞれ、流路４５〜４８に設けられている。空気供給装置２０は、空気吹出口３５に流路４５を介して空気を供給し、空気吹出口３６に流路４６を介して空気を供給し、空気吹出口３７に流路４７を介して空気を供給し、空気吹出口３８に流路４８を介して空気を供給する。空気吹出口３５〜３８は空気を水中に吹き出す。   Referring to FIG. 10, resistance reduction device 10 includes channels 45 to 48 and valves 55 to 58. The flow path 45 connects the air supply device 20 and the air outlet 35. The flow path 46 connects the air supply device 20 and the air outlet 36. The flow path 47 connects the air supply device 20 and the air outlet 37. The flow path 48 connects the air supply device 20 and the air outlet 38. The valves 55 to 58 are provided in the flow paths 45 to 48, respectively. The air supply device 20 supplies air to the air outlet 35 via the channel 45, supplies air to the air outlet 36 via the channel 46, and air to the air outlet 37 via the channel 47. And air is supplied to the air outlet 38 via the flow path 48. The air outlets 35 to 38 blow out air into the water.

制御装置１１は、水流の流入角βに基づいて、空気供給装置２０、及び、バルブ５０〜５２、５５〜５８を制御する。   The control device 11 controls the air supply device 20 and the valves 50 to 52 and 55 to 58 based on the inflow angle β of the water flow.

以下、本実施形態に係る船舶の抵抗低減方法を説明する。   Hereinafter, the ship resistance reduction method according to the present embodiment will be described.

水流の流入角βが第１角度のとき（水流１００がセンターラインＣＬと平行のとき）、制御装置１１は第１制御を実行する。第１制御において、制御装置１１は、バルブ５０〜５２を開状態にバルブ５５〜５８を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御する。空気吹出口３０〜３２から空気が吹き出され、空気吹出口３５〜３８から空気が吹き出されない。   When the inflow angle β of the water flow is the first angle (when the water flow 100 is parallel to the center line CL), the control device 11 executes the first control. In the first control, the control device 11 controls the total air supply amount of the air supply device 20 to the first air supply amount by keeping the valves 50 to 52 open and the valves 55 to 58 closed. Air is blown out from the air outlets 30 to 32, and air is not blown out from the air outlets 35 to 38.

図１１を参照して、水流の流入角βが第１角度より大きい第２角度のとき（水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき）、制御装置１１は、第２制御を実行する。第２制御において、制御装置１１は、バルブ５０、５１、５５、及び５７を開状態にバルブ５２、５６、及び５８を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御する。空気吹出口３０、３１、３５、及び３７から空気が吹き出されるが、水流１００の下流側に位置する空気吹出口３２、３６、及び３８から空気が吹き出されない。空気吹出口３０、３１、３５、及び３７から吹き出された空気によって空気層（気泡層）１３０、１３１、１３５及び１３７が形成される。空気層１３０、１３１、１３５及び１３７によって船底７の大部分が覆われる。   Referring to FIG. 11, when the water flow inflow angle β is a second angle larger than the first angle (when the water flow 100 is oblique to the center line CL and the water flow 100 flows from the port 5 to the starboard 6), The control device 11 performs the second control. In the second control, the control device 11 keeps the valves 50, 51, 55, and 57 open and the valves 52, 56, and 58 closed, and sets the total air supply amount of the air supply device 20 to the first air. Control the supply amount. Air is blown out from the air outlets 30, 31, 35, and 37, but air is not blown out from the air outlets 32, 36, and 38 located on the downstream side of the water flow 100. Air layers (bubble layers) 130, 131, 135, and 137 are formed by the air blown from the air outlets 30, 31, 35, and 37. Most of the bottom 7 is covered with the air layers 130, 131, 135 and 137.

ここで、図１１の場合における馬力低減量は図５の場合における馬力低減量に比べて大きい。船底７の空気層１３０、１３１、１３５及び１３７によって覆われる部分の面積が船底７の空気層１３０〜１３２によって覆われる部分の面積よりも大きいからである。一方、空気供給装置の総空気供給量が第１空気供給量でかわらないため、図１１の場合における空気吹き出し動力は図５の場合における空気吹き出し動力と同じである。したがって、図１１の場合の方が図５の場合に比べて空気潤滑による正味の省エネ効果が優れている。   Here, the horsepower reduction amount in the case of FIG. 11 is larger than the horsepower reduction amount in the case of FIG. This is because the area of the portion covered with the air layers 130, 131, 135, and 137 on the bottom 7 is larger than the area of the portion covered with the air layers 130 to 132 on the bottom 7. On the other hand, since the total air supply amount of the air supply device does not change with the first air supply amount, the air blowing power in the case of FIG. 11 is the same as the air blowing power in the case of FIG. Therefore, in the case of FIG. 11, the net energy saving effect by air lubrication is superior to the case of FIG.

尚、水流が右舷６から左舷５に流れる場合、制御装置１１は、バルブ５０、５１、５５、及び５７を開状態にバルブ５２、５６、及び５８を閉状態に保持するかわりに、バルブ５０、５２、５６、及び５８を開状態にバルブ５１、５５、及び５７を閉状態に保持する。   When the water flow flows from the starboard 6 to the port 5, the control device 11 does not hold the valves 50, 51, 55, and 57 in the open state but keeps the valves 52, 56, and 58 in the closed state. The valves 51, 55, and 57 are held closed while the valves 52, 56, and 58 are opened.

更に、第２制御において、制御装置１１は、空気供給装置２０の総空気供給量を第１空気供給量より大きい値に制御してもよい。また、空気吹出口３５及び３６が設けられて空気吹出口３７及び３８が設けられない場合と、空気吹出口３７及び３８が設けられて空気吹出口３５及び３６が設けられない場合とが可能である。   Further, in the second control, the control device 11 may control the total air supply amount of the air supply device 20 to a value larger than the first air supply amount. Moreover, the case where the air outlets 35 and 36 are provided and the air outlets 37 and 38 are not provided, and the case where the air outlets 37 and 38 are provided and the air outlets 35 and 36 are not provided are possible. is there.

（第３の実施形態）
図１２を参照して、本発明の第３の実施形態に係る抵抗低減装置１０を説明する。本実施形態に係る抵抗低減装置１０は、下記の点を除いて第２の実施形態に係る抵抗低減装置１０と同じである。本実施形態に係る抵抗低減装置１０は、空気吹出口３５〜３８のかわりに、空気吹出回収口６１〜６４を備える。空気吹出口３０〜３２は、船底７の領域７ａに配置される。空気吹出回収口６１及び６２は、船底７の領域７ｂに配置される。空気吹出回収口６３及び６４は、船底７の領域７ｃに配置される。領域７ｂは、領域７ａより船尾３側に位置する。領域７ｃは、領域７ｂより船尾３側に位置する。空気吹出回収口６１及び６３は、センターラインＣＬより左舷５側に設けられている。空気吹出回収口６２及び６４は、センターラインＣＬより右舷６側に設けられている。空気吹出回収口６１〜６４の各々は、Ｙ方向に配列された複数の空気吹出回収孔又はＹ方向に延びるスリット孔から水中に空気を吹き出し、及び、水中から空気を回収する。 (Third embodiment)
With reference to FIG. 12, the resistance reduction apparatus 10 which concerns on the 3rd Embodiment of this invention is demonstrated. The resistance reduction device 10 according to the present embodiment is the same as the resistance reduction device 10 according to the second embodiment except for the following points. The resistance reduction device 10 according to the present embodiment includes air outlet collection ports 61 to 64 instead of the air outlets 35 to 38. The air outlets 30 to 32 are disposed in the region 7 a of the ship bottom 7. The air outlet collection ports 61 and 62 are disposed in the region 7 b of the ship bottom 7. The air outlet collection ports 63 and 64 are disposed in the region 7 c of the ship bottom 7. The region 7b is located closer to the stern 3 than the region 7a. The region 7c is located closer to the stern 3 than the region 7b. The air outlet collection ports 61 and 63 are provided on the port 5 side from the center line CL. The air outlet collection ports 62 and 64 are provided on the starboard 6 side from the center line CL. Each of the air outlet collection ports 61 to 64 blows air into the water from a plurality of air outlet collection holes arranged in the Y direction or a slit hole extending in the Y direction, and collects the air from the water.

図１３を参照して、抵抗低減装置１０は、流路４５〜４８及びバルブ５５〜５８のかわりに、空気吹出回収配管システム７０を備える。空気吹出回収配管システム７０は、バルブ７１〜７４と、空気供給装置７５とを備える。空気吹出回収配管システム７０は、空気吹出回収口６１及び６３が水中から回収した空気を空気吹出回収口６２及び６４が水中に吹き出すことが可能なように、空気吹出回収口６２及び６４が水中から回収した空気を空気吹出回収口６１及び６３が水中に吹き出すことが可能なように、空気吹出回収口６１〜６４を互いに接続する。空気供給装置７５は、コンプレッサ又はブロワのような空気を加圧して供給する装置である。ここで、水中から回収した空気を空気供給装置７５で加圧しないで水中に吹き出してもよく、水中から回収した空気を空気供給装置７５で加圧してから水中に吹き出してもよい。水中から回収した空気を空気供給装置７５で加圧しないで水中に吹き出す場合、回収した空気を水中に吹き出すための空気吹き出し動力はゼロである。水中から回収した空気を空気供給装置７５で加圧してから水中に吹き出す場合であっても、水中から回収された空気の圧力は大気圧より高い。そのため、回収した空気を水中に吹き出すための空気吹き出し動力は、大気圧の空気を空気供給装置７５で加圧して水中に吹き出すための空気吹き出し動力より小さい。   Referring to FIG. 13, the resistance reduction device 10 includes an air blowing / collecting piping system 70 instead of the flow paths 45 to 48 and the valves 55 to 58. The air outlet collection piping system 70 includes valves 71 to 74 and an air supply device 75. The air blowing and collecting piping system 70 is configured so that the air blowing and collecting ports 62 and 64 can be blown from the water so that the air blowing and collecting ports 62 and 64 can blow the air collected from the water. The air outlet collection ports 61 to 64 are connected to each other so that the collected air can be blown out into the water. The air supply device 75 is a device that pressurizes and supplies air such as a compressor or a blower. Here, the air collected from the water may be blown out into the water without being pressurized by the air supply device 75, or the air collected from the water may be blown out into the water after being pressurized by the air supply device 75. When the air recovered from the water is blown into the water without being pressurized by the air supply device 75, the air blowing power for blowing the recovered air into the water is zero. Even when the air recovered from the water is pressurized by the air supply device 75 and then blown into the water, the pressure of the air recovered from the water is higher than the atmospheric pressure. Therefore, the air blowing power for blowing the collected air into the water is smaller than the air blowing power for pressurizing the atmospheric pressure air with the air supply device 75 and blowing it into the water.

制御装置１１は、水流の流入角βに基づいて、空気供給装置２０と、バルブ５０〜５２と、空気吹出回収配管システム７０を制御する。   The control device 11 controls the air supply device 20, the valves 50 to 52, and the air outlet collection piping system 70 based on the inflow angle β of the water flow.

以下、本実施形態に係る船舶の抵抗低減方法を説明する。   Hereinafter, the ship resistance reduction method according to the present embodiment will be described.

水流の流入角βが第１角度のとき（水流１００がセンターラインＣＬと平行のとき）、制御装置１１は第１制御を実行する。第１制御において、制御装置１１は、バルブ５０〜５２を開状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御し、空気吹出回収口６１〜６４が空気を回収も吹き出しもしないように空気吹出回収配管システム７０を制御する。空気吹出口３０〜３２から空気が吹き出され、空気吹出回収口６１〜６４から空気が回収も吹き出しもされない。   When the inflow angle β of the water flow is the first angle (when the water flow 100 is parallel to the center line CL), the control device 11 executes the first control. In the first control, the control device 11 holds the valves 50 to 52 in an open state, controls the total air supply amount of the air supply device 20 to the first air supply amount, and the air outlet collection ports 61 to 64 supply air. The air blowing / collecting piping system 70 is controlled so as not to collect and blow out. Air is blown out from the air outlets 30 to 32, and no air is collected or blown out from the air outlet collection ports 61 to 64.

図１４を参照して、水流の流入角βが第１角度より大きい第２角度のとき（水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき）、制御装置１１は、第２制御を実行する。第２制御において、制御装置１１は、バルブ５０及び５１を開状態にバルブ５２を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量より少ない第２空気供給量に制御し、空気吹出回収口６２及び６４が水中から回収した空気を空気吹出回収口６１及び６３が水中に吹き出すように空気吹出回収配管システム７０を制御する。空気吹出口３０及び３１から空気が吹き出されるが、水流１００の下流側に位置する空気吹出口３２から空気が吹き出されない。更に、水流１００の下流側に位置する空気吹出回収口６２及び６４が船底７から漏れ出ようとする空気を回収し、水流１００の上流側に位置する空気吹出回収口６１及び６３が回収された空気を水中に吹き出す。空気吹出口３０及び３１、並びに、空気吹出回収口６１及び６３から吹き出された空気によって空気層（気泡層）１３０、１３１、１６１及び１６３が形成される。空気層１３０、１３１、１６１及び１６３によって船底７の大部分が覆われる。   Referring to FIG. 14, when the water flow inflow angle β is a second angle larger than the first angle (when the water flow 100 is oblique to the center line CL and the water flow 100 flows from the port 5 to the starboard 6), The control device 11 performs the second control. In the second control, the control device 11 keeps the valves 50 and 51 open and the valve 52 closed, and sets the total air supply amount of the air supply device 20 to a second air supply amount that is smaller than the first air supply amount. The air blowing and collecting ports 62 and 64 control the air blowing and collecting piping system 70 so that the air blowing and collecting ports 61 and 63 blow out the water into the water. Air is blown out from the air outlets 30 and 31, but air is not blown out from the air outlet 32 located on the downstream side of the water flow 100. Further, the air outlet collection ports 62 and 64 located on the downstream side of the water flow 100 collect air that is about to leak from the bottom 7, and the air outlet collection ports 61 and 63 located on the upstream side of the water flow 100 are collected. Blow air into the water. Air layers (bubble layers) 130, 131, 161 and 163 are formed by the air blown from the air blowout ports 30 and 31 and the air blowout collection ports 61 and 63. Most of the bottom 7 is covered by the air layers 130, 131, 161 and 163.

本実施形態によれば、水流１００の下流側で回収した空気を水流１００の上流側で水中に吹き出しているため、空気潤滑による正味の省エネ効果が更に向上する。   According to this embodiment, since the air collected on the downstream side of the water stream 100 is blown out into the water on the upstream side of the water stream 100, the net energy saving effect by air lubrication is further improved.

尚、水流１００が右舷６から左舷５に流れる場合、制御装置１１は、バルブ５０及び５２を開状態にバルブ５１を閉状態に保持し、空気吹出回収口６１及び６３が水中から回収した空気を空気吹出回収口６２及び６４が水中に吹き出すように空気吹出回収配管システム７０を制御する   When the water flow 100 flows from the starboard 6 to the port 5, the control device 11 holds the valves 50 and 52 in the open state and the valve 51 in the closed state, and the air blowing collection ports 61 and 63 collect the air collected from the water. The air blowing and collecting piping system 70 is controlled so that the air blowing and collecting ports 62 and 64 blow out into the water.

（第３の実施形態の変形例）
図１５を参照して、第３の実施形態の変形例に係る抵抗低減装置１０を説明する。本変形例に係る抵抗低減装置１０は、下記の点を除いて第３の実施形態に係る抵抗低減装置１０と同じである。本変形例に係る抵抗低減装置１０は、流路８１及び８２と、バルブ９１及び９２とを備える。流路８１及び８２は、空気吹出回収配管システム７０と空気吹出口３０〜３２とを接続する。バルブ９１及び９２は、それぞれ、流路８１及び８２に設けられている。制御装置１１は、バルブ９１及び９２を制御する。本実施形態によれば、空気吹出回収口６１〜６４が水中から回収した空気を空気吹出口３０〜３２から吹き出すことができる。 (Modification of the third embodiment)
With reference to FIG. 15, the resistance reduction apparatus 10 which concerns on the modification of 3rd Embodiment is demonstrated. The resistance reduction device 10 according to this modification is the same as the resistance reduction device 10 according to the third embodiment except for the following points. The resistance reduction device 10 according to this modification includes flow paths 81 and 82 and valves 91 and 92. The flow paths 81 and 82 connect the air outlet collection piping system 70 and the air outlets 30 to 32. The valves 91 and 92 are provided in the flow paths 81 and 82, respectively. The control device 11 controls the valves 91 and 92. According to the present embodiment, the air collected by the air outlet collection ports 61 to 64 can be blown out from the air outlets 30 to 32.

（第４の実施形態）
図１６を参照して、本発明の第４の実施形態に係る抵抗低減装置１０を説明する。本実施形態に係る抵抗低減装置１０は、下記の点を除いて第３の実施形態に係る抵抗低減装置１０と同じである。本実施形態に係る抵抗低減装置１０は、空気吹出回収口６１及び６２を備えるが、空気吹出回収口６３及び６４を備えない。空気吹出回収口６１は、左舷５の舷側に沿って設けられる。空気吹出回収口６２は、右舷６の舷側に沿って設けられる。空気吹出回収口６１及び６２の各々は、Ｘ方向に配列された複数の空気吹出回収孔又はＸ方向に延びるスリット孔から水中に空気を吹き出し、及び、水中から空気を回収する。 (Fourth embodiment)
With reference to FIG. 16, the resistance reduction apparatus 10 which concerns on the 4th Embodiment of this invention is demonstrated. The resistance reduction device 10 according to the present embodiment is the same as the resistance reduction device 10 according to the third embodiment except for the following points. The resistance reduction device 10 according to the present embodiment includes the air outlet collection ports 61 and 62 but does not include the air outlet collection ports 63 and 64. The air outlet collection port 61 is provided along the heel side of the port 5. The air outlet collection port 62 is provided along the heel side of the starboard 6. Each of the air outlet collection ports 61 and 62 blows air into the water from a plurality of air outlet collection holes arranged in the X direction or a slit hole extending in the X direction, and collects the air from the water.

図１７を参照して、空気吹出回収配管システム７０は、空気吹出回収口６１が水中から回収した空気を空気吹出回収口６２が水中に吹き出すことが可能なように、空気吹出回収口６２が水中から回収した空気を空気吹出回収口６１が水中に吹き出すことが可能なように、空気吹出回収口６１及び６２を互いに接続する。   Referring to FIG. 17, in the air outlet recovery piping system 70, the air outlet recovery port 62 is submerged so that the air outlet recovery port 61 can blow out the air recovered from the water. The air outlet collection ports 61 and 62 are connected to each other so that the air outlet recovery port 61 can blow out the air recovered from the water.

以下、本実施形態に係る船舶の抵抗低減方法を説明する。   Hereinafter, the ship resistance reduction method according to the present embodiment will be described.

水流の流入角βが第１角度のとき（水流１００がセンターラインＣＬと平行のとき）、制御装置１１は第１制御を実行する。第１制御において、制御装置１１は、バルブ５０〜５２を開状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量に制御し、空気吹出回収口６１及び６２が空気を回収も吹き出しもしないように空気吹出回収配管システム７０を制御する。空気吹出口３０〜３２から空気が吹き出され、空気吹出回収口６１及び６２から空気が回収も吹き出しもされない。   When the inflow angle β of the water flow is the first angle (when the water flow 100 is parallel to the center line CL), the control device 11 executes the first control. In the first control, the control device 11 holds the valves 50 to 52 in an open state, controls the total air supply amount of the air supply device 20 to the first air supply amount, and the air outlet collection ports 61 and 62 supply air. The air blowing / collecting piping system 70 is controlled so as not to collect and blow out. Air is blown out from the air blowout ports 30 to 32, and air is neither collected nor blown out from the air blowout collection ports 61 and 62.

水流の流入角βが第１角度より大きい第２角度のとき（水流１００がセンターラインＣＬに対して斜めであって水流１００が左舷５から右舷６に流れるとき）、制御装置１１は、第２制御を実行する。第２制御において、制御装置１１は、バルブ５０及び５１を開状態にバルブ５２を閉状態に保持し、空気供給装置２０の総空気供給量を第１空気供給量より少ない第２空気供給量に制御し、空気吹出回収口６２が水中から回収した空気を空気吹出回収口６１が水中に吹き出すように空気吹出回収配管システム７０を制御する。空気吹出口３０及び３１から空気が吹き出されるが、水流１００の下流側に位置する空気吹出口３２から空気が吹き出されない。更に、水流１００の下流側に位置する空気吹出回収口６２が船底７から漏れ出ようとする空気を回収し、水流１００の上流側に位置する空気吹出回収口６１が回収された空気を水中に吹き出す。空気吹出口３０及び３１、並びに、空気吹出回収口６１から吹き出された空気によって形成される空気層（気泡層）によって船底７の大部分が覆われる。   When the water flow inflow angle β is a second angle larger than the first angle (when the water flow 100 is oblique to the center line CL and the water flow 100 flows from the port 5 to the starboard 6), the control device 11 Execute control. In the second control, the control device 11 keeps the valves 50 and 51 open and the valve 52 closed, and sets the total air supply amount of the air supply device 20 to a second air supply amount that is smaller than the first air supply amount. And the air outlet recovery piping system 70 is controlled so that the air outlet recovery port 62 blows out the air recovered from the water by the air outlet recovery port 62 into the water. Air is blown out from the air outlets 30 and 31, but air is not blown out from the air outlet 32 located on the downstream side of the water flow 100. Further, the air outlet collection port 62 located on the downstream side of the water stream 100 collects air that is about to leak from the bottom 7, and the air outlet collection port 61 located on the upstream side of the water stream 100 collects the collected air into the water. Blow out. Most of the bottom 7 is covered with an air layer (bubble layer) formed by the air blown from the air blowout ports 30 and 31 and the air blowout collection port 61.

本実施形態によれば、水流の流入角βの第２角度が大きいときに、船底７の空気層で覆われる部分の面積が大きくなる。   According to this embodiment, when the second angle of the water flow inflow angle β is large, the area of the portion of the ship bottom 7 covered with the air layer becomes large.

以上、実施の形態を参照して本発明による船舶の抵抗低減装置、船舶、及び船舶の抵抗低減方法を説明したが、本発明による船舶の抵抗低減装置、船舶、及び船舶の抵抗低減方法は上記実施形態に限定されない。上記実施形態に変更を加えたり上記実施形態どうしを組み合わせたりすることが可能である。   The ship resistance reduction device, the ship, and the ship resistance reduction method according to the present invention have been described above with reference to the embodiments. However, the ship resistance reduction device, the ship, and the ship resistance reduction method according to the present invention are described above. It is not limited to the embodiment. It is possible to add a change to the said embodiment or to combine the said embodiment.

１…船体
２…船首
３…船尾
５…左舷
６…右舷
７…船底
７ａ〜７ｃ…領域
８…プロペラ
９…舵
１０…抵抗低減装置
１１…制御装置
１５…水流の流入角検出装置
１６…ジャイロ
１７…ドップラーソナー
１８…ＧＰＳ装置
１９…水流の流入角計算装置
２０…空気供給装置
３０〜３８…空気吹出口
４０〜４８、８１、８２…流路
５０〜５８、９１、９２…バルブ
６１〜６４…空気吹出回収口
７０…空気吹出回収配管システム
７１〜７４…バルブ
７５…空気供給装置
１００…水流
１３０〜１３２、１３５、１３７、１６１、１６３…空気層
ＣＬ…センターライン
Ｘ…縦方向（船首船尾方向）
Ｙ…横方向（船幅方向）
α…船首方位
β…水流の流入角
ＶＧ…対地船速ベクトル
ＶＷ…対水船速ベクトル DESCRIPTION OF SYMBOLS 1 ... Hull 2 ... Bow 3 ... Stern 5 ... Port 6 ... Starboard 7 ... Bottom 7a-7c ... Area 8 ... Propeller 9 ... Rudder 10 ... Resistance reduction device 11 ... Control device 15 ... Water flow inflow angle detection device 16 ... Gyro 17 ... Doppler sonar 18 ... GPS device 19 ... Water flow inflow angle calculation device 20 ... Air supply devices 30-38 ... Air outlets 40-48, 81, 82 ... Flow channels 50-58, 91, 92 ... Valves 61-64 ... Air outlet collection port 70 ... Air outlet collection piping system 71-74 ... Valve 75 ... Air supply device 100 ... Water flow 130-132, 135, 137, 161, 163 ... Air layer CL ... Center line X ... Longitudinal direction (forward / stern direction) )
Y ... Lateral direction (ship width direction)
α: Heading β: Water flow inflow angle VG: Ground speed vector VW: Water speed vector

Claims (11)

船舶の船底のセンターラインより左舷及び右舷の一方側に設けられた一方側第１空気吹出口と、
前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口と、
前記一方側第１空気吹出口に一方側第１流路を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路を介して空気を供給する空気供給装置と、
前記一方側第１流路に設けられた一方側第１バルブと、
前記他方側第１流路に設けられた他方側第１バルブと、
前記船舶に対する水流の流入角を検出する流入角検出装置と、
制御装置と
を具備し、
前記制御装置は、前記検出された流入角に応じて第１制御と第２制御との一方を実行し、
前記第１制御において、前記制御装置は、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持する
船舶の抵抗低減装置。 A first air outlet on one side provided on one side of the port and starboard from the center line of the bottom of the ship;
The other side first air outlet provided on the other side of the port and starboard from the center line of the ship bottom;
An air supply device that supplies air to the one side first air outlet through the first side first flow path and supplies air to the other side first air outlet through the other side first flow path;
One side first valve provided in the one side first flow path;
The other side first valve provided in the other side first flow path;
An inflow angle detection device for detecting an inflow angle of water flow to the ship;
A control device,
The control device executes one of a first control and a second control according to the detected inflow angle ,
In the first control, the control device holds the one side first valve and the other side first valve in an open state,
In the second control, the control device holds the one-side first valve in an open state and the other-side first valve in a closed state. 船舶の船底のセンターラインより左舷及び右舷の一方側に設けられた一方側第１空気吹出口と、
前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口と、
前記一方側第１空気吹出口に一方側第１流路を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路を介して空気を供給する空気供給装置と、
前記一方側第１流路に設けられた一方側第１バルブと、
前記他方側第１流路に設けられた他方側第１バルブと、
制御装置と
を具備し、
前記船底の前記センターラインより前記一方側に設けられた一方側第２空気吹出口と、
前記船底の前記センターラインより前記他方側に設けられた他方側第２空気吹出口と、
前記一方側第２空気吹出口に接続された一方側第２流路と、
前記一方側第２流路に設けられた一方側第２バルブと、
前記他方側第２空気吹出口に接続された他方側第２流路と、
前記他方側第２流路に設けられた他方側第２バルブと
を更に具備し、
前記空気供給装置は、前記一方側第２空気吹出口に前記一方側第２流路を介して空気を供給し、前記他方側第２空気吹出口に前記他方側第２流路を介して空気を供給し、
前記一方側第２空気吹出口は、前記一方側第１空気吹出口より前記センターラインに近く、
前記他方側第２空気吹出口は、前記他方側第１空気吹出口より前記センターラインに近く、
前記制御装置は、第１制御と第２制御とを実行し、
前記第１制御において、前記制御装置は、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持し、
前記制御装置は、水流が前記船舶の前記一方側から前記他方側へ流れるときに前記第２制御及び第３制御を実行し、
前記制御装置は、
前記船舶に対する水流の流入角が第１角度のときに前記第１制御を実行し、
前記水流の流入角が前記第１角度より大きい第２角度のときに前記第２制御を実行し、
前記水流の流入角が前記第２角度より大きい第３角度のときに前記第３制御を実行し、
前記第１制御において、前記制御装置は、前記一方側第２バルブ及び前記他方側第２バルブを開状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第２バルブ及び前記他方側第２バルブを開状態に保持し、
前記第３制御において、前記制御装置は、前記一方側第１バルブ及び前記一方側第２バルブを開状態に前記他方側第１バルブ及び前記他方側第２バルブを閉状態に保持する
船舶の抵抗低減装置。 A first air outlet on one side provided on one side of the port and starboard from the center line of the bottom of the ship;
The other side first air outlet provided on the other side of the port and starboard from the center line of the ship bottom;
An air supply device that supplies air to the one side first air outlet through the first side first flow path and supplies air to the other side first air outlet through the other side first flow path;
One side first valve provided in the one side first flow path;
The other side first valve provided in the other side first flow path;
With control device
Comprising
One side second air outlet provided on the one side from the center line of the ship bottom;
The other side second air outlet provided on the other side from the center line of the ship bottom;
One side second flow path connected to the one side second air outlet;
One side second valve provided in the one side second flow path;
The other side second flow path connected to the other side second air outlet,
A second valve on the other side provided in the second flow path on the other side;
The air supply device supplies air to the one side second air outlet through the one side second flow path, and supplies air to the other side second air outlet through the other side second flow path. Supply
The one side second air outlet is closer to the center line than the one side first air outlet,
The other side second air outlet is closer to the center line than the other side first air outlet,
The control device executes a first control and a second control,
In the first control, the control device holds the one side first valve and the other side first valve in an open state,
In the second control, the control device holds the one-side first valve in an open state and the other-side first valve in a closed state,
The control device performs the second control and the third control when a water flow flows from the one side of the ship to the other side,
The controller is
Executing the first control when the inflow angle of the water flow to the ship is a first angle;
Executing the second control when the inflow angle of the water flow is a second angle larger than the first angle;
Executing the third control when the inflow angle of the water flow is a third angle larger than the second angle;
In the first control, the control device holds the one-side second valve and the other-side second valve in an open state,
In the second control, the control device holds the one-side second valve and the other-side second valve in an open state,
In the third control, the control device holds the one-side first valve and the one-side second valve in an open state and holds the other-side first valve and the other-side second valve in a closed state. Reduction device. 船舶の船底のセンターラインより左舷及び右舷の一方側に設けられた一方側第１空気吹出口と、
前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口と、
前記一方側第１空気吹出口に一方側第１流路を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路を介して空気を供給する空気供給装置と、
前記一方側第１流路に設けられた一方側第１バルブと、
前記他方側第１流路に設けられた他方側第１バルブと、
制御装置と
を具備し、
前記船底の前記センターラインより前記一方側に設けられた一方側第３空気吹出口と、
前記船底の前記センターラインより前記他方側に設けられた他方側第３空気吹出口と、
前記一方側第３空気吹出口に接続された一方側第３流路と、
前記一方側第３流路に設けられた一方側第３バルブと、
前記他方側第３空気吹出口に接続された他方側第３流路と、
前記他方側第３流路に設けられた他方側第３バルブと
を更に具備し、
前記空気供給装置は、前記一方側第３空気吹出口に前記一方側第３流路を介して空気を供給し、前記他方側第３空気吹出口に前記他方側第３流路を介して空気を供給し、
前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域に配置され、
前記一方側第３空気吹出口及び前記他方側第３空気吹出口は前記船底の第２領域に配置され、
前記第２領域は前記第１領域より船尾側に位置し、
前記制御装置は、第１制御と第２制御とを実行し、
前記第１制御において、前記制御装置は、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持し、
前記第１制御において、前記制御装置は、前記一方側第３バルブ及び前記他方側第３バルブを閉状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第３バルブを開状態に前記他方側第３バルブを閉状態に保持する
船舶の抵抗低減装置。 A first air outlet on one side provided on one side of the port and starboard from the center line of the bottom of the ship;
The other side first air outlet provided on the other side of the port and starboard from the center line of the ship bottom;
An air supply device that supplies air to the one side first air outlet through the first side first flow path and supplies air to the other side first air outlet through the other side first flow path;
One side first valve provided in the one side first flow path;
The other side first valve provided in the other side first flow path;
With control device
Comprising
One side third air outlet provided on the one side from the center line of the ship bottom;
The other side third air outlet provided on the other side from the center line of the ship bottom;
One side third flow path connected to the one side third air outlet,
One side third valve provided in the one side third flow path;
The other side third flow path connected to the other side third air outlet,
And further comprising the other side third valve provided in the other side third flow path,
The air supply device supplies air to the one side third air outlet through the one side third flow path, and supplies air to the other side third air outlet through the other side third flow path. Supply
The one side first air outlet and the other side first air outlet are arranged in a first region of the ship bottom,
The one side third air outlet and the other side third air outlet are arranged in a second region of the ship bottom,
The second region is located on the stern side of the first region,
The control device executes a first control and a second control,
In the first control, the control device holds the one side first valve and the other side first valve in an open state,
In the second control, the control device holds the one-side first valve in an open state and the other-side first valve in a closed state,
In the first control, the control device holds the one-side third valve and the other-side third valve in a closed state,
In the second control, the control device holds the one-side third valve in an open state and holds the other-side third valve in a closed state. 船舶の船底のセンターラインより左舷及び右舷の一方側に設けられた一方側第１空気吹出口と、
前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口と、
前記一方側第１空気吹出口に一方側第１流路を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路を介して空気を供給する空気供給装置と、
前記一方側第１流路に設けられた一方側第１バルブと、
前記他方側第１流路に設けられた他方側第１バルブと、
制御装置と
を具備し、
前記船底の前記センターラインより前記一方側に設けられた一方側空気吹出回収口と、
前記船底の前記センターラインより前記他方側に設けられた他方側空気吹出回収口と
を更に具備し、
前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域に配置され、
前記一方側空気吹出回収口及び前記他方側空気吹出回収口は前記船底の第２領域に配置され、
前記第２領域は前記第１領域より船尾側に位置し、
前記制御装置は、第１制御と第２制御とを実行し、
前記第１制御において、前記制御装置は、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持し、
前記制御装置が前記第２制御を実行するとき、前記他方側空気吹出回収口は水中から空気を回収し、前記一方側空気吹出回収口は前記他方側空気吹出回収口が回収した空気を水中に吹き出す
船舶の抵抗低減装置。 A first air outlet on one side provided on one side of the port and starboard from the center line of the bottom of the ship;
The other side first air outlet provided on the other side of the port and starboard from the center line of the ship bottom;
An air supply device that supplies air to the one side first air outlet through the first side first flow path and supplies air to the other side first air outlet through the other side first flow path;
One side first valve provided in the one side first flow path;
The other side first valve provided in the other side first flow path;
With control device
Comprising
One side air outlet recovery port provided on the one side from the center line of the ship bottom;
Further comprising an air outlet collection port on the other side provided on the other side from the center line of the ship bottom,
The one side first air outlet and the other side first air outlet are arranged in a first region of the ship bottom,
The one side air outlet recovery port and the other side air outlet recovery port are arranged in a second region of the ship bottom,
The second region is located on the stern side of the first region,
The control device executes a first control and a second control,
In the first control, the control device holds the one side first valve and the other side first valve in an open state,
In the second control, the control device holds the one-side first valve in an open state and the other-side first valve in a closed state,
When the control device executes the second control, the other side air outlet recovery port recovers air from the water, and the one side air outlet recovery port passes the air recovered by the other side air outlet recovery port into the water. A device to reduce ship resistance. 請求項１乃至４のいずれか一項に記載の船舶の抵抗低減装置であって、
前記第１制御において、前記制御装置は、前記空気供給装置の総空気供給量を第１空気供給量に制御し、
前記第２制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第１空気供給量より少ない第２空気供給量に制御する
船舶の抵抗低減装置。 The ship's resistance reduction device according to any one of claims 1 to 4 ,
In the first control, the control device controls a total air supply amount of the air supply device to a first air supply amount,
In the second control, the control device controls a total air supply amount of the air supply device to a second air supply amount that is smaller than the first air supply amount. 請求項２に記載の船舶の抵抗低減装置であって、
前記第１制御において、前記制御装置は、前記空気供給装置の総空気供給量を第１空気供給量に制御し、
前記第２制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第１空気供給量より少ない第２空気供給量に制御し、
前記第３制御において、前記制御装置は、前記空気供給装置の総空気供給量を前記第２空気供給量より少ない第３空気供給量に制御する
船舶の抵抗低減装置。 The ship resistance reduction device according to claim 2,
In the first control, the control device controls a total air supply amount of the air supply device to a first air supply amount,
In the second control, the control device controls the total air supply amount of the air supply device to a second air supply amount that is less than the first air supply amount,
In the third control, the control device controls a total air supply amount of the air supply device to a third air supply amount that is smaller than the second air supply amount. 請求項２に記載の船舶の抵抗低減装置であって、
前記船底の前記センターラインより前記一方側に設けられた一方側第３空気吹出口と、
前記船底の前記センターラインより前記他方側に設けられた他方側第３空気吹出口と、
前記一方側第３空気吹出口に接続された一方側第３流路と、
前記一方側第３流路に設けられた一方側第３バルブと、
前記他方側第３空気吹出口に接続された他方側第３流路と、
前記他方側第３流路に設けられた他方側第３バルブと
を更に具備し、
前記空気供給装置は、前記一方側第３空気吹出口に前記一方側第３流路を介して空気を供給し、前記他方側第３空気吹出口に前記他方側第３流路を介して空気を供給し、
前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域に配置され、
前記一方側第３空気吹出口及び前記他方側第３空気吹出口は前記船底の第２領域に配置され、
前記第２領域は前記第１領域より船尾側に位置し、
前記第１制御において、前記制御装置は、前記一方側第３バルブ及び前記他方側第３バルブを閉状態に保持し、
前記第２制御において、前記制御装置は、前記一方側第３バルブを開状態に前記他方側第３バルブを閉状態に保持する
船舶の抵抗低減装置。 The ship resistance reduction device according to claim 2 ,
One side third air outlet provided on the one side from the center line of the ship bottom;
The other side third air outlet provided on the other side from the center line of the ship bottom;
One side third flow path connected to the one side third air outlet,
One side third valve provided in the one side third flow path;
The other side third flow path connected to the other side third air outlet,
And further comprising the other side third valve provided in the other side third flow path,
The air supply device supplies air to the one side third air outlet through the one side third flow path, and supplies air to the other side third air outlet through the other side third flow path. Supply
The one side first air outlet and the other side first air outlet are arranged in a first region of the ship bottom,
The one side third air outlet and the other side third air outlet are arranged in a second region of the ship bottom,
The second region is located on the stern side of the first region,
In the first control, the control device holds the one-side third valve and the other-side third valve in a closed state,
In the second control, the control device holds the one-side third valve in an open state and holds the other-side third valve in a closed state. 請求項２に記載の船舶の抵抗低減装置であって、
前記船底の前記センターラインより前記一方側に設けられた一方側空気吹出回収口と、
前記船底の前記センターラインより前記他方側に設けられた他方側空気吹出回収口と
を更に具備し、
前記一方側第１空気吹出口及び前記他方側第１空気吹出口は前記船底の第１領域に配置され、
前記一方側空気吹出回収口及び前記他方側空気吹出回収口は前記船底の第２領域に配置され、
前記第２領域は前記第１領域より船尾側に位置し、
前記制御装置が前記第２制御を実行するとき、前記他方側空気吹出回収口は水中から空気を回収し、前記一方側空気吹出回収口は前記他方側空気吹出回収口が回収した空気を水中に吹き出す
船舶の抵抗低減装置。 The ship resistance reduction device according to claim 2 ,
One side air outlet recovery port provided on the one side from the center line of the ship bottom;
Further comprising an air outlet collection port on the other side provided on the other side from the center line of the ship bottom,
The one side first air outlet and the other side first air outlet are arranged in a first region of the ship bottom,
The one side air outlet recovery port and the other side air outlet recovery port are arranged in a second region of the ship bottom,
The second region is located on the stern side of the first region,
When the control device executes the second control, the other side air outlet recovery port recovers air from the water, and the one side air outlet recovery port passes the air recovered by the other side air outlet recovery port into the water. A device to reduce ship resistance. 請求項４又は８に記載の船舶の抵抗低減装置であって、
前記一方側空気吹出回収口は前記一方側の舷側に沿って設けられ、
前記他方側空気吹出回収口は前記他方側の舷側に沿って設けられる
船舶の抵抗低減装置。 The ship resistance reduction device according to claim 4 or 8 ,
The one side air outlet collection port is provided along the one side ridge side,
The said other side air blowing collection | recovery port is provided along the said other side shore side. 請求項１乃至９のいずれか一項に記載の抵抗低減装置と、
推進力を発生するプロペラと
を具備する
船舶。 The resistance reduction device according to any one of claims 1 to 9 ,
A ship equipped with a propeller that generates propulsion. 船舶に対する水流の流入角を検出するステップと、
検出された流入角が第１角度のときに抵抗低減装置の第１制御を実行するステップと、
前記検出された流入角が前記第１角度より大きい第２角度のときに前記抵抗低減装置の第２制御を実行するステップと
を具備し、
前記抵抗低減装置は、
前記船舶の船底のセンターラインより左舷及び右舷の一方側に設けられた一方側第１空気吹出口と、
前記船底の前記センターラインより前記左舷及び前記右舷の他方側に設けられた他方側第１空気吹出口と、
前記一方側第１空気吹出口に一方側第１流路を介して空気を供給し、前記他方側第１空気吹出口に他方側第１流路を介して空気を供給する空気供給装置と、
前記一方側第１流路に設けられた一方側第１バルブと、
前記他方側第１流路に設けられた他方側第１バルブと
を備え、
前記第１制御を実行するステップにおいて、前記一方側第１バルブ及び前記他方側第１バルブを開状態に保持し、
前記第２制御を実行するステップにおいて、前記一方側第１バルブを開状態に前記他方側第１バルブを閉状態に保持する
船舶の抵抗低減方法。 Detecting the inflow angle of the water flow to the ship;
Executing the first control of the resistance reduction device when the detected inflow angle is the first angle;
Performing the second control of the resistance reducing device when the detected inflow angle is a second angle greater than the first angle,
The resistance reducing device includes:
A first air outlet on one side provided on one side of the port side and starboard side from the center line of the bottom of the ship;
The other side first air outlet provided on the other side of the port and starboard from the center line of the ship bottom;
An air supply device that supplies air to the one side first air outlet through the first side first flow path and supplies air to the other side first air outlet through the other side first flow path;
One side first valve provided in the one side first flow path;
The other side first valve provided in the other side first flow path,
In the step of executing the first control, the one side first valve and the other side first valve are held in an open state,
In the step of executing the second control, the one-side first valve is kept in an open state and the other-side first valve is kept in a closed state.
JP2011286546A 2011-12-27 2011-12-27 Ship resistance reduction device Expired - Fee Related JP5804938B2 (en)

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