CN110053752A - A kind of rudder face cavitation effect inhibition device - Google Patents
A kind of rudder face cavitation effect inhibition device Download PDFInfo
- Publication number
- CN110053752A CN110053752A CN201910392837.8A CN201910392837A CN110053752A CN 110053752 A CN110053752 A CN 110053752A CN 201910392837 A CN201910392837 A CN 201910392837A CN 110053752 A CN110053752 A CN 110053752A
- Authority
- CN
- China
- Prior art keywords
- snorkel
- rudder
- air pump
- rudder face
- face
- 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.)
- Pending
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Classifications
-
- 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
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/38—Rudders
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention is to provide a kind of rudder face cavitation effects to inhibit device.Including air pump and snorkel, the air pump is mounted on hull interior, and at the gap between rudder horn and rudder blade, the upper end of snorkel is fixed on transom and is connected with air pump snorkel, the lower end closed of snorkel is provided with the stomata blown on rudder blade face on snorkel.The present invention at gap to rudder face by blowing, so that rudder face pressure rise, it is not likely to produce cavitation effect, the kinetic energy that fluid near boundary layer separation point can be increased, moves back burble point, reduces Disengagement zone, achieve the effect that reduce form drag, and laminar region can be extended, critical Reynolds number can be improved, viscous drag can be substantially reduced below critical Reynolds number.
Description
Technical field
The present invention relates to a kind of rudder, specifically a kind of cavitation effect inhibits device.
Background technique
Vacuole is that occur on the basis of liquid medium is by progressive failure, is the result of pressure reduction.Work as liquid
When certain interior point pressure is reduced to some critical pressure or less, liquid is vaporized, microcosmic before this, then becomes the stingy of macroscopic view
Bubble, thereafter on the interface of liquid internal or liquid and solid, converges the cavity to form biggish steam and gas, referred to as empty
Bubble.The Emergence and Development of vacuole and the process of crumbling and fall are known as cavitation phenomenon.
As vacuole generates, downstream, generally, the pressure around vacuole can rise bubble stream once again, and vacuole tends to
It disappears.However, since vacuole generates suddenly, the waterpower to rush over can make bubbles burst, and intensely mutually collision again
With it is mutually exclusive, bubble is repeatedly destroyed and generates in the impact conditions caused by.This phenomenon can cause the fluid of surrounding
Violent pressure change is generated, noise is issued.Body surface there also results in resistance in addition to being caused damage by impact
Power increases significantly.
Rudder is the steering mechanism of ship, is mainly made of rudder horn and rudder blade.Rudder horn is fixed on transom, rudder blade with
Rudder horn is connected and rudder blade can be rotated, and rudder horn and rudder blade have certain gap.When ship needs to turn to, rudder blade forms one
The angle of attack, rudder face one side forms higher-pressure region, another side forms low-pressure area, the formation pressure difference between two rudder faces, to generate power
Make ship turning, when the pressure of low-pressure area is down to saturated vapor pressure will water will generate bubble, bubble row to pressure general goal
When, bubble collapse, bubble generates and shattered to pieces process will generate damage to rudder face.
Summary of the invention
The purpose of the present invention is to provide one kind can alleviate or inhibit the rudder face cavitation of ship tail vane cavitation effect to imitate
It should inhibit device.
The object of the present invention is achieved like this: including air pump and snorkel, the air pump is mounted on hull interior, ventilation
It manages at the gap between rudder horn and rudder blade, the upper end of snorkel is fixed on transom and is connected with air pump, ventilation
The lower end closed of pipe is provided with the stomata blown on rudder blade face on snorkel.
The present invention may also include:
1. the snorkel has two, two snorkels are symmetrically placed about rudder blade chord length.
2. stomata is uniformly distributed along snorkel length.
The present invention, so that rudder face pressure rise, is not likely to produce cavitation effect, can be increased by blowing at gap to rudder face
The kinetic energy of fluid, moves back burble point near boundary layer separation point, reduces Disengagement zone, achievees the effect that reduce form drag, and
And laminar region can be extended, critical Reynolds number can be improved, viscous drag can be substantially reduced below critical Reynolds number.
The beneficial effects are mainly reflected as follows:
(1) present invention can be inflated to rudder face low-pressure area so that rudder face pressure rise, is not likely to produce cavitation effect.
(2) present invention adds two snorkels at rudder blade maximum gauge, inflates to rudder blade surface, can increase boundary layer point
From the kinetic energy for putting fluid nearby, burble point is moved back, reduce Disengagement zone, achievees the effect that reduce form drag.
(3) method of inhibition rudder face effect of the invention can extend laminar region, can improve critical Reynolds number, in critical thunder
Viscous drag can be substantially reduced below promise number.
Detailed description of the invention
Fig. 1 is the matching relationship schematic diagram of snorkel and rudder face；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the side view of Fig. 1；
Fig. 4 is the operation schematic diagram of Fig. 1；
Fig. 5 is that rudder face cavitation effect of the invention inhibits scheme of installation of the device on ship；
Fig. 6 is the side view of Fig. 5；
Fig. 7 is boundary layer schematic diagram；
Fig. 8 is boundary layer partial enlargement diagram.
Specific embodiment
It illustrates below and the present invention is described in more detail.
In conjunction with Fig. 1 to Fig. 6, it includes air pump 7 and snorkel 4, air pump installation that rudder face cavitation effect of the invention, which inhibits device,
In hull interior, snorkel is at the gap between rudder horn and rudder blade, the upper end of snorkel be fixed on transom 8 and with
Air pump is connected, the lower end closed of snorkel.Rudder horn 1 is connected with rudder blade 2 and rudder blade 2 can be rotated, and snorkel 4 is located at rudder horn
1 and rudder blade 2 gap 3 in, two snorkels 4 are symmetrically placed about chord length, and stomata 5 is distributed on snorkel 4, stomata 5 along
Length distribution, blows on rudder face, and air pump 7 is located at 8 top of transom, and air pump 7 is connected with snorkel 4, fills into snorkel 4
Gas, propeller 6 are located at 1 front of rudder horn, and water flow is discharged backward, beats and on rudder face hull is turned to for propeller 6.
When ship needs to turn to, rudder blade forms an angle of attack, and rudder face one side forms higher-pressure region, and another side forms low pressure
Area, the formation pressure difference between two rudder faces, so that generating power makes ship turning, when the pressure of low-pressure area is down to saturated vapor pressure
When will water will generate bubble, when bubble row to pressure general goal, bubble collapse, bubble is generated and shattered to pieces process will be to rudder
Face generates damage, thus blows to rudder face surface so that low-pressure area pressure is consistently higher than saturated vapor pressure under this temperature, then can press down
The generation of vacuole processed.
In conjunction with Fig. 7 and Fig. 8, the flow direction in figure is that rear is shifted to from rudder face leading edge, and boundary layer is large Reynold number flowing
Adherent coating in problem, what the parallel rows in Fig. 8 indicated is speed, length representative size, and arrow direction represents direction, leads to
The arrow on 4 side of tracheae represents the flow direction of fluid, it can be seen that the boundary layer before gap 3, it is smaller closer to rudder face speed,
After gap 3, boundary layer becomes full, this is because the reason of snorkel 4 is blown to 2 surface of rudder blade, blows into boundary layer
Gas can increase the kinetic energy of fluid near boundary layer separation point, move back burble point, reduce Disengagement zone, reduce form drag, this
Laminar region can also be extended outside, reduce viscous drag.
Claims (3)
1. a kind of rudder face cavitation effect inhibits device, including air pump and snorkel, it is characterized in that: the air pump is mounted in hull
Portion, at the gap between rudder horn and rudder blade, the upper end of snorkel is fixed on transom and is connected with air pump snorkel
Lead to, the lower end closed of snorkel, is provided with the stomata blown on rudder blade face on snorkel.
2. rudder face cavitation effect according to claim 1 inhibits device, it is characterized in that: the snorkel has two, two
Snorkel is symmetrically placed about rudder blade chord length.
3. rudder face cavitation effect according to claim 1 or 2 inhibits device, it is characterized in that: stomata is along snorkel length
It is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392837.8A CN110053752A (en) | 2019-05-13 | 2019-05-13 | A kind of rudder face cavitation effect inhibition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910392837.8A CN110053752A (en) | 2019-05-13 | 2019-05-13 | A kind of rudder face cavitation effect inhibition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110053752A true CN110053752A (en) | 2019-07-26 |
Family
ID=67322862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910392837.8A Pending CN110053752A (en) | 2019-05-13 | 2019-05-13 | A kind of rudder face cavitation effect inhibition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110053752A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312180A (en) * | 2021-09-26 | 2022-04-12 | 中国北方车辆研究所 | Cavitation-controllable intelligent steering rudder plate device for amphibious vehicle |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198138A (en) * | 1995-09-29 | 1998-11-04 | 克里斯蒂安·奥德纳松工程公司 | Aircraft with jet flap propulsion |
| JP2004345458A (en) * | 2003-05-21 | 2004-12-09 | Mitsubishi Heavy Ind Ltd | Rudder device and vessel |
| DE10329517B4 (en) * | 2003-06-30 | 2005-07-14 | Howaldtswerke-Deutsche Werft Ag | ship rudder |
| CN101037135A (en) * | 2007-03-29 | 2007-09-19 | 上海大学 | Laser heating and cavitating device for equipment running under water |
| CN101186233A (en) * | 2007-12-19 | 2008-05-28 | 沪东中华造船(集团)有限公司 | Method for reducing vessels stern semi-balance suspension rudder blade surface cavitation |
| CN101531248A (en) * | 2007-11-13 | 2009-09-16 | 贝克船舶***有限及两合公司 | Rudder arrangement for ships with higher speeds with a cavitation reducing twisted rudder, in particular with a balancing rudder |
| CN101648596A (en) * | 2008-08-13 | 2010-02-17 | 贝克船舶***有限及两合公司 | Rudder arrangement for ships having higher speeds comprising a cavitation-reducing twisted, in particular balanced rudder |
| JP2012096751A (en) * | 2010-11-05 | 2012-05-24 | Mitsubishi Heavy Ind Ltd | Propulsion device for marine vessel |
| CN102951255A (en) * | 2011-08-17 | 2013-03-06 | 林瑞麟 | Method for reducing rudder resistance of ships |
| CN205417990U (en) * | 2016-03-01 | 2016-08-03 | 哈尔滨工程大学 | Surface of water high -speed navigation motion body structures of two bubbles of ventilating |
| CN106628071A (en) * | 2016-12-05 | 2017-05-10 | 中国航天空气动力技术研究院 | Navigation device suppressing cavitation and controlling emerging posture |
-
2019
- 2019-05-13 CN CN201910392837.8A patent/CN110053752A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198138A (en) * | 1995-09-29 | 1998-11-04 | 克里斯蒂安·奥德纳松工程公司 | Aircraft with jet flap propulsion |
| JP2004345458A (en) * | 2003-05-21 | 2004-12-09 | Mitsubishi Heavy Ind Ltd | Rudder device and vessel |
| DE10329517B4 (en) * | 2003-06-30 | 2005-07-14 | Howaldtswerke-Deutsche Werft Ag | ship rudder |
| CN101037135A (en) * | 2007-03-29 | 2007-09-19 | 上海大学 | Laser heating and cavitating device for equipment running under water |
| CN101531248A (en) * | 2007-11-13 | 2009-09-16 | 贝克船舶***有限及两合公司 | Rudder arrangement for ships with higher speeds with a cavitation reducing twisted rudder, in particular with a balancing rudder |
| CN101186233A (en) * | 2007-12-19 | 2008-05-28 | 沪东中华造船(集团)有限公司 | Method for reducing vessels stern semi-balance suspension rudder blade surface cavitation |
| CN101648596A (en) * | 2008-08-13 | 2010-02-17 | 贝克船舶***有限及两合公司 | Rudder arrangement for ships having higher speeds comprising a cavitation-reducing twisted, in particular balanced rudder |
| JP2012096751A (en) * | 2010-11-05 | 2012-05-24 | Mitsubishi Heavy Ind Ltd | Propulsion device for marine vessel |
| CN102951255A (en) * | 2011-08-17 | 2013-03-06 | 林瑞麟 | Method for reducing rudder resistance of ships |
| CN205417990U (en) * | 2016-03-01 | 2016-08-03 | 哈尔滨工程大学 | Surface of water high -speed navigation motion body structures of two bubbles of ventilating |
| CN106628071A (en) * | 2016-12-05 | 2017-05-10 | 中国航天空气动力技术研究院 | Navigation device suppressing cavitation and controlling emerging posture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312180A (en) * | 2021-09-26 | 2022-04-12 | 中国北方车辆研究所 | Cavitation-controllable intelligent steering rudder plate device for amphibious vehicle |
| CN114312180B (en) * | 2021-09-26 | 2023-09-29 | 中国北方车辆研究所 | Cavitation-controllable intelligent steering rudder plate device for amphibious vehicle |
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