CN103112547A - Ship surface micro-hole jet flow drag reduction structure - Google Patents
Ship surface micro-hole jet flow drag reduction structure Download PDFInfo
- Publication number
- CN103112547A CN103112547A CN2012104375500A CN201210437550A CN103112547A CN 103112547 A CN103112547 A CN 103112547A CN 2012104375500 A CN2012104375500 A CN 2012104375500A CN 201210437550 A CN201210437550 A CN 201210437550A CN 103112547 A CN103112547 A CN 103112547A
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- ship
- drag reduction
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- ridge
- coverboard
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- 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
Abstract
The invention provides a ship surface micro-hole jet flow drag reduction structure. The ship surface micro-hole jet flow drag reduction structure comprises diversion grooves (3) which are formed below a ship waterline, wherein a multi-hole shell plate (5) is covered on the diversion grooves (3) in the side face of a ship, a ship stem screen plate (6) is covered on the diversion grooves (3) in the front portion of the ship, the size of the cross sections of the diversion grooves (3) extending to the ship tail portion is gradually decreased and a water discharge hole (2) is formed. Micro-hole jet flow is formed on the wall face below the ship waterline, is utilized to change a border layer flow field so as to reach the purpose of reducing resistance of ship navigation. When the structure is manufactured and installed, a traditional ship building method is not changed, machining is easy, and engineering practice is convenient.
Description
Technical field
The present invention relates to a kind of structure that reduces ship resistance.
Background technology
At present, along with the process of economic globalization is constantly accelerated, the sea route transportation development is rapid, and various boats and ships are used very extensive as main marine communication means.During ship's navigation, suffered resistance mainly comprises the friction drag two parts at bow pressure and ship wall and contact with sea water interface.Bow pressure and skin friction drag when effectively reducing ship's navigation are to saving fuel, when extending boat, the important in inhibiting of increasing economic efficiency.The existing ship drag reduction method designs mainly for profile, as ship design is become stream line pattern, perhaps forwardly design ball nose structure, common drag reduction method mainly contains at present: bubble drag-reduction, flute surfaces drag reduction, retinue wave surface drag reduction, flexible surface drag reduction, interpolation drag reduction by polymer etc.Its Main Problems is: although these drag reduction methods are feasible on mechanism, drag-reduction effect is also apparent in view, but when using on boats and ships or aircraft, technical risk is larger, the change contour structures that some needs are larger or need some special accessory equipments, this makes and is difficult to realize on existing boats and ships, and also will run into same technical difficulty in ship design.Because boats and ships surfaces mainly is formed by smooth steel plate splicing, when ship's navigation, because the viscosity of seawater makes the larger friction drag of existence between boats and ships and contact with sea water interface, in addition, for the boats and ships of certain profile, the bow pressure during navigation is also larger.Therefore, constantly explore new, the actv. drag reduction method is significant.
Summary of the invention
The purpose of this invention is to provide a kind of bow pressure and skin friction drag when realizing reducing ship's navigation, have the boats and ships surface micropore jet drag reduction structure of good drag-reduction energy-saving effect.
The object of the present invention is achieved like this:
Comprise and be arranged on the following flame diversion trough 3 of drauht line, cover porous coverboard 5 on the flame diversion trough 3 of vessel's side, cover bow web plate 6 on the flame diversion trough 3 of boats and ships front portion, the sectional dimension that extends to the flame diversion trough 3 of stern part reduces, forms discharge port 2 gradually.
The present invention can also comprise:
1, described flame diversion trough 3 levels equidistantly distribute, and are provided with ridge-like structure 4 between two adjacent flame diversion troughs, and described porous coverboard 5 and bow web plate 6 are fixed on described ridge-like structure 4.
2, the lip-deep small hole 9 of porous coverboard 5 is staggered.
3, described small hole 9 inclination certain angles, tiltangleθ=300～900.
4, the upper surface of ridge-like structure 4 has tapped bore 8, and described porous coverboard 5 and bow web plate 6 are bolted on ridge-like structure 4.
The present invention relates to and can make boats and ships underwater wall form micro-hole jet, utilizes this jet can change boundary layer flow field, reaches the purpose that reduces ship resistance.
Advantage of the present invention is: when ship's navigation, the present invention program can introduce flame diversion trough 3 to part bow seawater and penetrate along the lip-deep micropore 9 of porous coverboard 5, the jet that forms can change the flow field at wall and contact with sea water interface, thus the friction drag when having reduced motion of ship; Simultaneously, reduced bow pressure when flame diversion trough 3 is guided the bow seawater into shipboard and stern, in addition, the present invention relates to structure and making, do not change traditional shipbuilding mode when installing and be easy to processing, be convenient to engineering practice.
Description of drawings
Fig. 1: be overall construction drawing of the present invention;
Fig. 2: the A-A cross sectional view that is overall structure of the present invention;
Fig. 3: be ridge-like structure and porous coverboard connection diagram;
Fig. 4: be flame diversion trough tail structure figure;
Fig. 5: be porous coverboard surface micropore Pareto diagram;
Fig. 6: be bow web plate schematic diagram;
Fig. 7: the enlarged view that is the micropore in porous coverboard surface.
The specific embodiment
Further illustrate specific implementation process of the present invention below in conjunction with the accompanying drawing illustrated embodiment.
Fig. 1, Fig. 2 are the structural representations of one embodiment of the invention, and it is comprised of hull bottom flame diversion trough 3, porous coverboard 5 and bow web plate 6.Described hull bottom flame diversion trough 3 horizontal distribution are at the hull underwater, and adjacent two flame diversion troughs are separated by ridge-like structure 4, and the upper surface of ridge-like structure 4 has tapped bore 8 can be fixed on porous coverboard 5 and bow web plate 6, as shown in Figure 3.When flame diversion trough 3 extends to stern, sectional dimension reduces gradually, forms discharge port 2, as shown in Figure 4.Porous coverboard 5 covers on the flame diversion trough 3 of vessel's side, connects with ridge-like structure 4 by bolt, also can be welded on ridge-like structure 4, and the be staggered small hole 9 at certain diameter and certain angle of inclination of its surface, as shown in Figure 5.Bow web plate 6 covers on the flame diversion trough of boats and ships front portion, and its surface is square net structure 1, and as shown in Figure 6, connecting mode is identical with porous coverboard 5.
The present invention relates to embodiment is of a size of: hull bottom flame diversion trough 3 width d and quantity can adopt according to the boats and ships size length of side a=0.15m of different design values, afterbody discharge port 2; The high 0.5m of ridge-like structure 4, wide 0.1m; The long 2m of porous coverboard 5, wide 1.1m, thick 5mm; The internal diameter φ of the small hole 9 in surface, φ=2～6mm wherein, the tiltangleθ of perforate on plate, θ=300～900 wherein, leaning angle is fluid flow direction angulation in small hole line of centers and boats and ships External airflow field, hole is (water (flow) direction) spacing L=50～300mm, transverse pitch D=5～20mm vertically, and for different boats and ships, each parameter is got different value.Bow web plate 6 oads are identical with porous coverboard 5, the side length b=0.1m of surperficial square net structure 1.
The present invention relates to the manufacture that embodiment relates to structure is: hull bottom flame diversion trough 3 has increased ridge-like structure 4 and has formed when welding ship wall 7; Porous coverboard 5 used and bow web plate 6 can directly be processed into the sheet material with the regulation length and width size of small hole 9, also can cut into required size when constructing by the bulk sheet material with small hole 9.Can be the when mounted on-the-spot processing of plate upper screwed hole 8 runs into and can cut and splice by welding sheet material when irregularly shaped.
The principle of work that the present invention relates to the ship drag reduction method is: when ship's navigation, because bow pressure is larger, make the part seawater enter flame diversion trough 3 by bow web plate 6, the effect of bow web plate 6 is the larger foreign material of filtering and sees through seawater, seawater is motion backward in flame diversion trough 3, small hole 9 on the porous coverboard 5 of installing by the side penetrates, and namely forms many micro-hole jets in vessel's side; The effect of jet has changed the flow field at ship wall and contact with sea water interface, the friction drag when having reduced motion of ship; At last, the part seawater is carried 2 outflows along flame diversion trough 3 from the afterbody discharge port of less foreign material secretly, and the side length b of the square net structure 1 in design process on bow web plate 6 surfaces is slightly less than flame diversion trough 3 afterbodys discharge port 2 length of side a, so that less foreign material are discharged smoothly.Because the part seawater flows to sidewall and stern along flame diversion trough, so compare with traditional boats and ships of identical appearance size, bow pressure also reduces to some extent.
Claims (9)
1. boats and ships surface micropore jet drag reduction structure, it is characterized in that: comprise being arranged on the following flame diversion trough (3) of drauht line, at the upper porous coverboard (5) that covers of the flame diversion trough (3) of vessel's side, at the upper bow web plate (6) that covers of the flame diversion trough (3) of boats and ships front portion, the sectional dimension that extends to the flame diversion trough (3) of stern part reduces, forms discharge port (2) gradually.
2. boats and ships surface micropore jet drag reduction structure according to claim 1, it is characterized in that: described flame diversion trough (3) level equidistantly distributes, be provided with ridge-like structure (4) between two adjacent flame diversion troughs, described porous coverboard (5) and bow web plate (6) are fixed on described ridge-like structure (4).
3. boats and ships surface micropore jet drag reduction structure according to claim 1 and 2, it is characterized in that: the lip-deep small hole of porous coverboard (5) (9) is staggered.
4. boats and ships surface micropore jet drag reduction structure according to claim 1 and 2, is characterized in that: described small hole (9) inclination certain angle.
5. boats and ships surface micropore jet drag reduction structure according to claim 5, is characterized in that: described small hole (9) inclination certain angle.
6. boats and ships surface micropore jet drag reduction structure according to claim 1 and 2, it is characterized in that: the upper surface of ridge-like structure (4) has tapped bore (8), and described porous coverboard (5) and bow web plate (6) are bolted on ridge-like structure (4).
7. boats and ships surface micropore jet drag reduction structure according to claim 3, it is characterized in that: the upper surface of ridge-like structure (4) has tapped bore (8), and described porous coverboard (5) and bow web plate (6) are bolted on ridge-like structure (4).
8. boats and ships surface micropore jet drag reduction structure according to claim 4, it is characterized in that: the upper surface of ridge-like structure (4) has tapped bore (8), and described porous coverboard (5) and bow web plate (6) are bolted on ridge-like structure (4).
9. boats and ships surface micropore jet drag reduction structure according to claim 5, it is characterized in that: the upper surface of ridge-like structure (4) has tapped bore (8), and described porous coverboard (5) and bow web plate (6) are bolted on ridge-like structure (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104375500A CN103112547A (en) | 2012-11-06 | 2012-11-06 | Ship surface micro-hole jet flow drag reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104375500A CN103112547A (en) | 2012-11-06 | 2012-11-06 | Ship surface micro-hole jet flow drag reduction structure |
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| Publication Number | Publication Date |
|---|---|
| CN103112547A true CN103112547A (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104375500A Pending CN103112547A (en) | 2012-11-06 | 2012-11-06 | Ship surface micro-hole jet flow drag reduction structure |
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| CN (1) | CN103112547A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741586A (en) * | 2016-12-22 | 2017-05-31 | 浙江大学 | A kind of ship water jet constrains bubble drag-reduction structure |
| CN108674575A (en) * | 2018-05-23 | 2018-10-19 | 南京理工大学 | A kind of fluid drag-reduction device |
| CN112109843A (en) * | 2020-09-30 | 2020-12-22 | 苏州静声泰科技有限公司 | Dynamic resistance reducing device |
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| CN85104618B (en) * | 1985-06-15 | 1986-12-10 | 丰岛兼人 | Hydraulic ship propelling device with suction inlet |
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| US5445095A (en) * | 1990-08-14 | 1995-08-29 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Polymer/riblet combination for hydrodynamic skin friction reduction |
| CN2347883Y (en) * | 1998-10-16 | 1999-11-10 | 黄成友 | Deflector-type propeller driving device |
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2012
- 2012-11-06 CN CN2012104375500A patent/CN103112547A/en active Pending
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| CN85104618B (en) * | 1985-06-15 | 1986-12-10 | 丰岛兼人 | Hydraulic ship propelling device with suction inlet |
| US4947785A (en) * | 1988-01-07 | 1990-08-14 | International Paint Public Limited Company | Improvements in or relating to boat hulls |
| US5445095A (en) * | 1990-08-14 | 1995-08-29 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Polymer/riblet combination for hydrodynamic skin friction reduction |
| CN2347883Y (en) * | 1998-10-16 | 1999-11-10 | 黄成友 | Deflector-type propeller driving device |
| JP2001114185A (en) * | 1999-10-19 | 2001-04-24 | Mitsubishi Heavy Ind Ltd | Sea water resistance reduced ship and resistance reducing method for hull |
| RU2186705C2 (en) * | 2000-10-26 | 2002-08-10 | Середа Владимир Николаевич | Device for reduction of hydrodynamic resistance of ship's hull |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741586A (en) * | 2016-12-22 | 2017-05-31 | 浙江大学 | A kind of ship water jet constrains bubble drag-reduction structure |
| CN106741586B (en) * | 2016-12-22 | 2019-01-04 | 浙江大学 | A kind of ship water jet constraint bubble drag-reduction structure |
| CN108674575A (en) * | 2018-05-23 | 2018-10-19 | 南京理工大学 | A kind of fluid drag-reduction device |
| CN108674575B (en) * | 2018-05-23 | 2020-10-27 | 南京理工大学 | Fluid damping device |
| CN112109843A (en) * | 2020-09-30 | 2020-12-22 | 苏州静声泰科技有限公司 | Dynamic resistance reducing device |
| CN112109843B (en) * | 2020-09-30 | 2022-03-08 | 苏州静声泰科技有限公司 | Dynamic resistance reducing device |
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Application publication date: 20130522 |