CN107264717A - A kind of bionical hydrofoil suitable for foilcraft - Google Patents
A kind of bionical hydrofoil suitable for foilcraft Download PDFInfo
- Publication number
- CN107264717A CN107264717A CN201710416201.3A CN201710416201A CN107264717A CN 107264717 A CN107264717 A CN 107264717A CN 201710416201 A CN201710416201 A CN 201710416201A CN 107264717 A CN107264717 A CN 107264717A
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- China
- Prior art keywords
- node
- hydrofoil
- guide margin
- foilcraft
- raised
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Classifications
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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
- B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
- B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
- B63B1/248—Shape, hydrodynamic features, construction of the foil
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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)
Abstract
The invention belongs to hydrofoil unit field, more particularly to a kind of bionical hydrofoil suitable for foilcraft, leading-edge sweep type, including wing plate and guide margin are shaped as.Wing plate is the straight wing of arc, and cutting plane is streamlined.Guide margin is concavo-convex leading edge structure, the drop shadow curve of guide margin is sine curve, there is raised node and depression node staggeredly on guide margin, the cutting plane of raised node and wing plate at depression node is streamlined, raised node is identical with the raised or sunken degree of depression node, raised node and depression node extend along guide margin to both sides, are smoothly transitted into wingtip.The cross section of the convex leading edge of guide margin is sine curve symmetrical above and below, altogether 4 half-wavelengths.The invention enables producing favourable rotation direction whirlpool in boundary layer, and then obtain the effect of drag reduction lift-rising；And concavo-convex leading edge structure causes hydrofoil surface to produce induction whirlpool so that fluid more docile increases angle of stall(ing) in airfoil surface.
Description
Technical field
The invention belongs to hydrofoil unit field, more particularly to a kind of bionical hydrofoil suitable for foilcraft.
Background technology
Hydrofoil or foilcraft are the vehicles in the water for can carry out high speed operation.The appearance of foilcraft, makes people exist
Save during the journey the time, enjoy bigger comfortableness.In short-distance transport, foilcraft has more the advantage in speed, the speed of foilcraft
Degree, can be comparable with land rapid transit vehicle up to 3 times of passenger traffic speed.When Froude number is larger, the resistance of foilcraft and
The weight ratio of foilcraft is less than other high-speed crafts, therefore foilcraft is more economical in navigation.At present, foilcraft is by widely
Applied to civilian and military field.In civil area, foilcraft be widely used in coastal, lake ripple, rivers, the quick passenger boat in canal and
Ferry boat；The workboat such as patrol boat and ambulance ship, fireboat；Wager boat, the surface high-speed boat such as yacht.Military field research and
Using, foilcraft as missile speedboat, torpedo boat, gunboat, and it is further development of and can carries the antisubmarine vessels of helicopter.
The bottom of hydrofoil hull is equipped with below support, support and is provided with hydrofoil plate, and hydrofoil plate is immersed in completely or partially
In water.According to hydromechanical principle, the bigger position of flow velocity, pressure is smaller.When ship is navigated by water in water, aqueous phase is for water
Wing plate quickly flows, and big by the water velocity of its upper surface, and the water velocity of lower surface is small, above and below such hydrofoil plate
Surface is formed pressure difference, when pressure difference it is big to a certain extent when, hull will be elevated, or even be higher by the water surface.Hull soaks
Volume not in water reduces, and the resistance of suffered water also accordingly significantly reduces, so, under identical propulsive force, peace
Higher speed can be reached by having filled the ship of hydrofoil.Compared with other high speed naval vessels technologies, the major advantage of foilcraft is
It can be navigated by water under more severe sea condition, the mountain peak of kayak body is winnowed with a dustpan less.It is right and produced wave making is more few during high speed operation
The influence on bank is relatively low.
Due to the requirement of present energy-saving and emission-reduction, whole shipping world and shipbuilding circles have reached newly for the requirement of energy consumption index
Highly.The resistance for how reducing navigation for shipbuilding is also a direction of many research institutional research, ship always
The reduction of oceangoing ship resistance can reach faster speed under nominal power, reach the purpose of energy-saving and emission-reduction.Can although installing hydrofoil
To effectively improve the headway of ship, but still there are many problems to have to be solved at present.Such as hydrofoil in underwater exercise, on
Lower aerofoil is all contacted with water.When water flows through hydrofoil, due to the viscosity of water in itself, a border can be formed on hydrofoil surface
Layer.Boundary layer is a thin layer, and it abuts hydrofoil surface, and very big velocity gradient and rotation are there is along hydrofoil surface normal direction
The flow region of degree.Viscous stress is resistance for the water body in boundary layer, so as water body flows backward along object plane, border
Water body in layer can gradually slow down, and be pressurized.Due to the continuity of water body flow, boundary layer can be thickening to be flowed through within the same time
More low speed water bodys.Therefore adverse pressure gradient is there is in boundary layer, flowing can further slow down under adverse pressure gradient effect,
The kinetic energy of water body in last whole boundary layer is all not enough to permanent maintenance flowing and downstream carried out always, so that in object table
Its speed of face somewhere can be with the velocity attitude of potential barrier on the contrary, producing adverse current.This can countercurrently squeeze boundary layer into potential barrier, make
Boundary layer is thickening suddenly or separates.Boundary layer separation can cause resistance to rise, especially because the pressure of position water body before and after hydrofoil
Strong poor rising so that pressure drag becomes big.Resistance, which rises, to cause speed to decline, and not having hydrofoil should play a part of.
In addition, hydrofoil has certain angle of attack with carrying out stream, wing section has camber, thus produces lift.The movement velocity of hydrofoil is improved constantly, the wing
Negative pressure on face just constantly declines, when negative pressure is brought down below water in the saturated vapor pressure at a temperature of at that time, the local wing
There is bubble in water on face, when bubble with water movement to higher-pressure region when, bubble receive extruding shrink in addition occur burst
Go out, be the process of cavitation along with Emergence and Development and the cyclic process crumbled and fall of bubble.Cavitation is a kind of very harmful shows
As, the consequence such as its meeting precocity mechanical damage, increase noise, and resistance increase and lift can be caused unstable, or even trigger calamity
Difficult matter event.
Application publication number discloses a kind of new and effective hydrofoil for CN103910023A patent, and the hydrofoil includes hydrofoil plate
And hydrofoil strut, hydrofoil plate water flowing cabane strut is fixedly mounted on below naval vessels, the outer surface of hydrofoil plate be provided with by rough zone,
The drag reduction structures that groove, pit or texture structure are constituted.Possess the hydrofoil plate of this drag reduction structures in underwater exercise, possess compared with
High lift-drag ratio, can reduce frictional resistance and viscosity resistance of the hydrofoil to water, but the hydrofoil is to the shape of the pit on surface,
Quantity and arrangement mode are required, it is not easy to grasped.
In recent years, bionical hydrofoil gradually enters into the visual field of people, and achieves certain development.
The content of the invention
Favourable rotation direction whirlpool is produced it is an object of the invention to provide a kind of thickness for changing hydrofoil boundary layer and in boundary layer,
So that fluid more docile is in airfoil surface, stall when slowing down the high angle of attack increases the bionical hydrofoil suitable for foilcraft of lift.
The object of the present invention is achieved like this：
A kind of bionical hydrofoil suitable for foilcraft, is shaped as leading-edge sweep type, including wing plate 4 and guide margin 3.
Wing plate 4 is the straight wing of arc, and cutting plane is streamlined.
Guide margin 3 is to have raised node 1 and depression node 2 staggeredly on concavo-convex leading edge structure, guide margin 3, and the projection of guide margin 3 is bent
Line is sine curve, and expression formula is y=H*sin (x*PI*10), y be point above guide margin to light water wing curve 5 away from
Be pi from, PI, H is the maximum gauge of wing plate cutting plane, X be point above guide margin to the distance of the wing plate leftmost side 6, take
It is (0, L) to be worth scope, and L is the length of the span.
The cutting plane of wing plate is streamlined, raised node and the raised or recessed of node that be recessed at raised node and depression node
The degree of falling into is identical, and raised node and depression node extend along guide margin to both sides, are smoothly transitted into wingtip.
The cross section of the convex leading edge of guide margin is sine curve symmetrical above and below, altogether 4 half-wavelengths.
Compared with prior art, the beneficial effects of the present invention are：
The concavo-convex leading edge structure of guide margin changes the thickness in hydrofoil boundary layer and favourable rotation direction whirlpool is produced in boundary layer, enters
And obtain the effect of drag reduction lift-rising；And concavo-convex leading edge structure causes hydrofoil surface to produce induction whirlpool so that fluid more docile in
Airfoil surface, increases angle of stall(ing).
Brief description of the drawings
Fig. 1 is a kind of bionical hydrofoil top view suitable for foilcraft；
Fig. 2 is a kind of bionical hydrofoil installation effect figure suitable for foilcraft；
Fig. 3 is a kind of bionical hydrofoil front view suitable for foilcraft.
Embodiment
The utility model is illustrated below in conjunction with the accompanying drawings：
A kind of bionical hydrofoil suitable for foilcraft, is shaped as leading-edge sweep type, including wing plate 4 and guide margin 3.
Such as Fig. 3, wing plate 4 is the straight wing of arc, and cutting plane is streamlined.6 be the wing plate leftmost side, and 7 be the wing plate rightmost side.5
For light water wing curve.
Such as Fig. 1, the present invention is to imitate the concavo-convex flipper in humpback edge.Guide margin 3 is concavo-convex leading edge structure, there is 9 above
The similar raised node 1 of individual shape and depression node 2, adjacent raised node are similar with depression node cross-sectional shapes, but at two
Tangent plane length it is different.Raised node is identical with the raised or sunken degree of depression node, extends along guide margin to both sides, smoothly
It is transitioned into wingtip.The drop shadow curve of guide margin 3 is sine curve, and expression formula is y=H*sin (x*PI*10) (SI), and y is on guide margin
The point in face is to the distance of light water wing curve 5, and PI is pi, and H is the maximum gauge of wing plate cutting plane, and X is above guide margin
Point to the wing plate leftmost side 6 distance, span be (0, L), L be the span length.
The cross section of hydrofoil guide margin convex leading edge is sine curve symmetrical above and below, 4 half-wavelengths altogether, each wavelength and
Wave amplitude is all equal.
Compared with common hydrofoil, in the case of the gross area identical of the wing, due to there is favourable rotation direction whirlpool in boundary layer, adopt
With the foilcraft of the present invention under the identical speed of a ship or plane, bigger lift can be obtained.
Present invention can apply to shallowly submerged hydrofoil ship, surface piercing hydrofoils ship, deep immersion foilcraft, the identical speed of a ship or plane is reached,
Less main engine power is needed using the foilcraft of the present invention, the concavo-convex leading edge structure of guide margin changes the thickness in hydrofoil boundary layer
And favourable rotation direction whirlpool is produced in boundary layer, and then obtain the effect of drag reduction lift-rising；And concavo-convex leading edge structure causes hydrofoil table
Face produces induction whirlpool so that fluid more docile increases angle of stall(ing), and foilcraft when enhancing the high speed of a ship or plane in airfoil surface
Stability, the generation of cavitation erosion, improves ship durability when reducing speed of a ship or plane navigation.
Here it must be noted that other unaccounted parts that the present invention is provided all are known to those skilled in the art,
According to title of the present invention or function, those skilled in the art can just find the document of related record, therefore not enter one
Walk explanation.
Claims (5)
1. a kind of bionical hydrofoil suitable for foilcraft, it is characterised in that：Including wing plate (4) and guide margin (3), it is shaped as after leading edge
Plunder type.
2. a kind of bionical hydrofoil suitable for foilcraft according to claim 1, it is characterised in that：Described wing plate (4)
For the straight wing of arc, cutting plane is streamlined.
3. a kind of bionical hydrofoil suitable for foilcraft according to claim 1, it is characterised in that：Described guide margin (3)
For concavo-convex leading edge structure, including raised node (1) and depression node (2).
4. a kind of bionical hydrofoil suitable for foilcraft according to claim 3, it is characterised in that：Described raised node
It is identical with the raised or sunken degree of depression node, extend along guide margin to both sides, be smoothly transitted into wingtip.
5. a kind of bionical hydrofoil suitable for foilcraft according to claim 1, it is characterised in that：The projection of guide margin (3)
Curve is：
Y=H*sin (x*PI*10),
Y is distance of the point above guide margin to light water wing curve (5), and PI is pi, and H is thick for the maximum of wing plate cutting plane
Degree, X is distance of the point above guide margin to the wing plate leftmost side (6), and span is (0, L), and L is the length of the span.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416201.3A CN107264717A (en) | 2017-06-06 | 2017-06-06 | A kind of bionical hydrofoil suitable for foilcraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416201.3A CN107264717A (en) | 2017-06-06 | 2017-06-06 | A kind of bionical hydrofoil suitable for foilcraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107264717A true CN107264717A (en) | 2017-10-20 |
Family
ID=60065507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710416201.3A Pending CN107264717A (en) | 2017-06-06 | 2017-06-06 | A kind of bionical hydrofoil suitable for foilcraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107264717A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109436183A (en) * | 2018-10-23 | 2019-03-08 | 哈尔滨工程大学 | A kind of bat type T-type lift-rising hydrofoil unit |
| CN112231828A (en) * | 2020-11-10 | 2021-01-15 | 哈尔滨工业大学 | Leading edge combined convex structure for controlling adhesion flow of airfoil surface and flow control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5136961A (en) * | 1989-12-21 | 1992-08-11 | Follett Harold E | Hydroplaning hydrofoil/airfoil structures and amphibious and aquatic craft |
| JPH08301178A (en) * | 1995-05-09 | 1996-11-19 | Yamaha Motor Co Ltd | Totally submerged type hydrofoil craft |
| CN202130569U (en) * | 2011-04-06 | 2012-02-01 | 哈尔滨工程大学 | Marine rudder with protruding guiding edge |
| CN202717022U (en) * | 2012-05-15 | 2013-02-06 | 哈尔滨工程大学 | Leading edge concave-convex propeller |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| CN103910023A (en) * | 2014-04-04 | 2014-07-09 | 浙江海洋学院 | Novel efficient hydrofoil |
| CN106080951A (en) * | 2016-06-12 | 2016-11-09 | 中国船舶重工集团公司第七○二研究所 | The Novel double-ball nose of a kind of band hydrofoil is combined stem |
| CN205737963U (en) * | 2016-05-20 | 2016-11-30 | 杭州华鹰游艇有限公司 | A kind of lifting hydrofoil |
-
2017
- 2017-06-06 CN CN201710416201.3A patent/CN107264717A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5136961A (en) * | 1989-12-21 | 1992-08-11 | Follett Harold E | Hydroplaning hydrofoil/airfoil structures and amphibious and aquatic craft |
| JPH08301178A (en) * | 1995-05-09 | 1996-11-19 | Yamaha Motor Co Ltd | Totally submerged type hydrofoil craft |
| CN202130569U (en) * | 2011-04-06 | 2012-02-01 | 哈尔滨工程大学 | Marine rudder with protruding guiding edge |
| CN202717022U (en) * | 2012-05-15 | 2013-02-06 | 哈尔滨工程大学 | Leading edge concave-convex propeller |
| CN102991658A (en) * | 2012-12-06 | 2013-03-27 | 哈尔滨工程大学 | Bionic propeller of ship |
| CN103910023A (en) * | 2014-04-04 | 2014-07-09 | 浙江海洋学院 | Novel efficient hydrofoil |
| CN205737963U (en) * | 2016-05-20 | 2016-11-30 | 杭州华鹰游艇有限公司 | A kind of lifting hydrofoil |
| CN106080951A (en) * | 2016-06-12 | 2016-11-09 | 中国船舶重工集团公司第七○二研究所 | The Novel double-ball nose of a kind of band hydrofoil is combined stem |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109436183A (en) * | 2018-10-23 | 2019-03-08 | 哈尔滨工程大学 | A kind of bat type T-type lift-rising hydrofoil unit |
| CN109436183B (en) * | 2018-10-23 | 2020-11-03 | 哈尔滨工程大学 | Bat type T-shaped high lift hydrofoil device |
| CN112231828A (en) * | 2020-11-10 | 2021-01-15 | 哈尔滨工业大学 | Leading edge combined convex structure for controlling adhesion flow of airfoil surface and flow control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171020 |
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| RJ01 | Rejection of invention patent application after publication |