JPH0541120Y2 - - Google Patents
Info
- Publication number
- JPH0541120Y2 JPH0541120Y2 JP4684688U JP4684688U JPH0541120Y2 JP H0541120 Y2 JPH0541120 Y2 JP H0541120Y2 JP 4684688 U JP4684688 U JP 4684688U JP 4684688 U JP4684688 U JP 4684688U JP H0541120 Y2 JPH0541120 Y2 JP H0541120Y2
- Authority
- JP
- Japan
- Prior art keywords
- rudder
- propeller
- angle
- attack
- stern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000926 separation method Methods 0.000 claims description 6
- 238000013459 approach Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は船の舵に関するものである。[Detailed explanation of the idea] (Industrial application field) The present invention relates to a ship's rudder.
（従来技術）
船の推進性能の向上を狙い、プロペラを船尾か
ら遠ざけて配置するオープンスターン型（open
stern type）が採用されつゝある。この様な船尾
に於てはプロペラと舵が近づき過ぎ、舵抵抗の増
加につながるため、却つて性能を劣化させる場合
がある。(Prior technology) Aiming to improve the propulsion performance of ships, open stern type propellers are placed away from the stern.
stern type) is being adopted. In such a stern, the propeller and rudder are too close together, leading to an increase in rudder resistance, which may actually deteriorate performance.
（考案の解決しようとする課題）
本考案はプロペラと舵が近づいても急激な抵抗
増加を起すことのない舵形状を提供しようとする
ものである。(Problems to be Solved by the Invention) The present invention attempts to provide a rudder shape that does not cause a sudden increase in resistance even when the propeller and rudder approach.
（考案による課題の解決手段）
プロペラを船尾より遠ざけて配置したオープン
スターン型の舵において、プロペラの後方に位置
する舵の先端中央部から上下に後退角θを設け
て、前縁における２次元はく離を防止するように
した。(Means for solving problems by invention) In an open stern type rudder in which the propeller is placed away from the stern, a sweepback angle θ is provided up and down from the center of the tip of the rudder located behind the propeller, and two-dimensional separation at the leading edge is achieved. This was made to prevent this.
（実施例）
第１図で符号１は本考案に係る舵を示す。２は
舵１の前方にあつて、船尾から離れて取付けられ
ているプロペラである。(Example) In FIG. 1, reference numeral 1 indicates a rudder according to the present invention. 2 is a propeller installed in front of the rudder 1 and away from the stern.
第２図ａは、第１図におけるｘ軸方向の流れの
速度Uxの変化の状態を表すグラフで、プロペラ
２の位置から舵１が離れるにつれてｘ軸方向の流
れの速度は大となることがわかる。 FIG. 2a is a graph showing changes in the flow speed Ux in the x-axis direction in FIG. 1. As the rudder 1 moves away from the propeller 2 position, the flow speed in the x-axis direction increases. Recognize.
第２図ｂはＺ軸方向、即ち船の進行方向と直交
する方向の流れの速度UZの変化を示し、プロペ
ラ２の位置から距離に関係なくUZは一定である
ことがわかる。 FIG. 2b shows changes in the velocity U Z of the flow in the Z-axis direction, that is, in a direction perpendicular to the direction of travel of the ship, and it can be seen that U Z is constant regardless of the distance from the position of the propeller 2.
第２図ｃは舵断面に対する平均的迎角α
（α＝tan-1UZ／Ux）の変化を示している。第２図
ａ，ｂからわかるように、プロペラ２からの距離
に関係なくUZが一定であるのに対してプロペラ
２から離れるにつれてUxが徐々に大きくなるこ
とから、プロペラ２から離れるにつれて迎角αは
徐々に小さくなつている。又この迎角αの変動に
ついては第３図ａ，ｂの比較で明らかなように、
プロペラと舵の距離が大きい程変動は小さくなる
ことがわかる（第３図ａは第２図ｃのＡ位置にお
ける迎角αの変動グラフ、同じく第３図ｂは第２
図ｃのＢ位置における迎角αの変動グラフ）。 Figure 2c shows the variation of the average angle of attack α (α=tan −1 U Z /Ux) with respect to the rudder cross section. As can be seen from Figure 2 a and b, while U Z is constant regardless of the distance from the propeller 2, Ux gradually increases as the distance from the propeller 2 increases, so the angle of attack increases as the distance from the propeller 2 increases. α is gradually decreasing. Also, regarding the fluctuation of this angle of attack α, as is clear from the comparison of Figure 3 a and b,
It can be seen that the larger the distance between the propeller and the rudder, the smaller the fluctuation (Figure 3 a is a graph of the variation of the angle of attack α at position A in Figure 2 c, and Figure 3 b is a graph of the change in the angle of attack
Graph of variation of angle of attack α at position B in Figure c).
以上の説明でわかるように、舵１とプロペラ２
間の距離が近づくにつれ、舵に対する迎角αの平
均値と変動が増していることが判る。迎角αが大
きくなるとはく離を生じ易くなり、抵抗が急激に
増大する。 As you can see from the above explanation, rudder 1 and propeller 2
It can be seen that the average value and variation of the angle of attack α with respect to the rudder increases as the distance between them approaches. As the angle of attack α increases, separation tends to occur, and resistance increases rapidly.
そこで本考案は第１図に示すように、舵１の先
端中央から上下に後退角θをつけてプロペラ２か
らの距離を大きくし、これによつて舵前縁位置で
のｘ軸方向の流れの速度Ux軸を増して迎角αを
減少させ、２次元的はく離を極力防いで、抵抗が
増大するのを抑えるようにした。 Therefore, as shown in Fig. 1, the present invention increases the distance from the propeller 2 by increasing the sweepback angle θ vertically from the center of the tip of the rudder 1, thereby increasing the flow in the x-axis direction at the leading edge of the rudder. By increasing the speed Ux axis and decreasing the angle of attack α, two-dimensional separation was prevented as much as possible, and an increase in resistance was suppressed.
以上説明した如く、舵１の前縁に先端中央から
上下に後退角θを付けることによつて、舵前縁位
置での迎角αを減少させ、２次元的はく離を防止
することが可能となつた。 As explained above, by giving the leading edge of the rudder 1 a sweepback angle θ vertically from the center of the tip, it is possible to reduce the angle of attack α at the leading edge position of the rudder and prevent two-dimensional separation. Summer.
（効果）
オープンスターン型の舵において、舵の先端中
央部から上下に後退角θを設けることにより、前
縁部での２次元はく離を防止し、その結果急激な
抵抗増加を防ぐことができるようになつた。(Effect) In an open stern type rudder, by providing a sweepback angle θ vertically from the center of the tip of the rudder, two-dimensional separation at the leading edge can be prevented, and as a result, a sudden increase in resistance can be prevented. It became.
舵の前縁部に後退角を設けるという簡単な改良
であるが、これにより抵抗増大を防ぐことがで
き、ひいては船舶の省エネルギーに寄与するとこ
ろ極めて大きいものがある。 Although it is a simple improvement to provide a sweepback angle on the leading edge of the rudder, it can prevent an increase in resistance and has an extremely large contribution to the energy saving of ships.
第１図は本考案に係る舵を示す。第２図ａは第
１図のｘ方向の速度変化を示すグラフ。第２図ｂ
は同じくＺ方向の速度変化を示すグラフ。第２図
ｃは同じく舵の迎角変化を示すグラフ。第３図ａ
は第２図ｃのＡ位置、即ちプロペラと舵間の距離
が大きい場合の迎角変動グラフである。第３図ｂ
は第２図ｃのＢ位置、即ちプロペラ−舵間の距離
が近い場合の迎角変動グラフ。
図において；１……舵、２……プロペラ。
FIG. 1 shows a rudder according to the present invention. FIG. 2a is a graph showing velocity changes in the x direction of FIG. 1. Figure 2b
is a graph similarly showing speed changes in the Z direction. FIG. 2c is a graph similarly showing changes in the angle of attack of the rudder. Figure 3a
is a graph of angle of attack variation at position A in FIG. 2c, that is, when the distance between the propeller and the rudder is large. Figure 3b
is a graph of angle of attack variation at position B in FIG. 2c, that is, when the distance between the propeller and the rudder is short. In the figure: 1... rudder, 2... propeller.
Claims (1)
スターン型の舵において、プロペラの後方に位置
する舵の先端中央部から上下に後退角θを設け
て、前縁における２次元はく離を防ぐようにした
ことを特徴とする舵。 In an open stern type rudder in which the propeller is placed away from the stern, a sweepback angle θ is provided up and down from the center of the tip of the rudder located behind the propeller to prevent two-dimensional separation at the leading edge. The rudder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4684688U JPH0541120Y2 (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4684688U JPH0541120Y2 (en) | 1988-04-08 | 1988-04-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01149891U JPH01149891U (en) | 1989-10-17 |
| JPH0541120Y2 true JPH0541120Y2 (en) | 1993-10-18 |
Family
ID=31273092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4684688U Expired - Lifetime JPH0541120Y2 (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0541120Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102129140B1 (en) * | 2014-01-02 | 2020-07-01 | 한국조선해양 주식회사 | Rudder for ship |
| KR102211146B1 (en) * | 2015-06-30 | 2021-02-01 | 한국조선해양 주식회사 | A rudder and a ship having the rudder |
| KR102211151B1 (en) * | 2015-06-30 | 2021-02-01 | 한국조선해양 주식회사 | A rudder and a ship having the rudder |
| KR102288939B1 (en) * | 2019-08-29 | 2021-08-11 | (주)디에이취엠씨 | Rudder for ship having rudder bulb |
-
1988
- 1988-04-08 JP JP4684688U patent/JPH0541120Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01149891U (en) | 1989-10-17 |
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