CN103498838B - A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure - Google Patents
A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure Download PDFInfo
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- CN103498838B CN103498838B CN201310472654.XA CN201310472654A CN103498838B CN 103498838 B CN103498838 B CN 103498838B CN 201310472654 A CN201310472654 A CN 201310472654A CN 103498838 B CN103498838 B CN 103498838B
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- flexible strip
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Abstract
The invention discloses a kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure, it is made up of rigidity rib and staggered the distributing alternately of flexible strip on rigid surface; The sectional shape of described rigidity rib is semicircle, triangle or semiellipse etc., and rigidity rib is higher than flexible strip 0.2 ~ 5mm, and the spacing of rigidity rib is 1 ~ 15mm, and the thickness of flexible strip is 0.5 ~ 4mm.The middle groove that the stiff rib bar of rigid surface is formed can limit flow to whirlpool exhibition to motion, make wall Turbulence-bursting weakened, reduce skin friction drag; Flexible strip wall between two rigidity ribs can reduce the fluctuation pressure of the sudden generation of wall turbulent flow, suppresses the frequency of wall vortex shedding, reduces surface friction drag further, reduces hydrodynamic noise.
Description
Technical field
The present invention relates to a kind of surface structure, particularly a kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure.
Background technique
Sail body in the ground traffic tools of high speed operation, aircraft and other water, its main energy consumption is for overcoming the surface friction drag of flowing medium.The problem that other energy consumption with fluid being the dynamic power machine of working medium causes due to surface friction drag as fluid pump, long distance pipeline and hydraulic machinery system etc. also ubiquity is huge.Reduce the surface friction drag of means of transportation and other dynamic power machine, raising headway and working efficiency are the great demands that national energy-saving reduces discharging strategy.
In recent decades, researcher by wall processing can not configuration of surface, play to a certain extent and reduce the effect of surface friction drag.The special construction that the present invention is formed by rigidity fin ray and flexible skin by fin inspires, and proposes a kind of hard and soft alternate bionic, drag-reducing surface.Following current to arranging that this surface significantly can reduce the surface friction drag of object in flowing medium, and can suppress aerodynamic noise.
Summary of the invention
The present invention is made up of rigidity rib and staggered the distributing alternately of flexible strip on rigid surface.
The sectional shape of described rigidity rib is semicircle, triangle or semiellipse etc., and rigidity rib is higher than flexible strip 0.2 ~ 5mm, and the spacing of rigidity rib is 1 ~ 15mm, and the thickness of flexible strip is 0.5 ~ 4mm.
The invention has the beneficial effects as follows:
(1) rigid surface stiff rib bar formed middle groove can limit flow to whirlpool exhibition to motion, make wall Turbulence-bursting weakened, reduce skin friction drag.
Flexible strip wall between (2) two rigidity ribs can reduce the fluctuation pressure of the sudden generation of wall turbulent flow, suppresses the frequency of wall vortex shedding, reduces surface friction drag further, reduces hydrodynamic noise.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of first embodiment of the invention.
Fig. 2 is the schematic cross-section of second embodiment of the invention.
Fig. 3 is the schematic cross-section of third embodiment of the invention.
Fig. 4 is the unit schematic cross-section of first embodiment of the invention.
Fig. 5 is the unit schematic cross-section of second embodiment of the invention.
Fig. 6 is the unit schematic cross-section of third embodiment of the invention.
Embodiment
Refer to shown in Fig. 1 and Fig. 4, for the first embodiment of the present invention, the present embodiment is made up of rigidity rib 1 and staggered the distributing alternately of flexible strip 2 on rigid surface, the sectional shape of rigidity rib 1 is semicircle, its radius R is 3mm, spacing L between rigidity rib 1 is 10mm, and the thickness N of flexible strip 2 is 2mm.
Refer to shown in Fig. 2 and Fig. 5, for the second embodiment of the present invention, the present embodiment is made up of rigidity rib 1 and staggered the distributing alternately of flexible strip 2 on rigid surface, the sectional shape of rigidity rib 1 is triangle, its vertex angle α is 60 °, summit is 5mm to the height H on base, and the spacing L between rigidity rib 1 is 8mm, and the thickness N of flexible strip 2 is 2mm.
Refer to shown in Fig. 3 and Fig. 6, for the third embodiment of the present invention, the present embodiment is made up of rigidity rib 1 and staggered the distributing alternately of flexible strip 2 on rigid surface, the sectional shape of rigidity rib 1 is half elliptic, the major axis a of its ellipse is 5mm, semi-minor axis b is 1.5mm, and the spacing L between rigidity rib 1 is 10mm, and the thickness N of flexible strip 2 is 1mm.
The material of described flexible strip can be rubber.
Claims (1)
1. the bionic, drag-reducing noise reduction surface of a hard and soft interphase structure, it is made up of rigidity rib and staggered the distributing alternately of flexible strip on rigid surface, it is characterized in that: described rigidity rib is higher than flexible strip 0.2 ~ 5mm, the spacing of rigidity rib is 1 ~ 15mm, and the thickness of flexible strip is 0.5 ~ 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310472654.XA CN103498838B (en) | 2013-10-11 | 2013-10-11 | A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310472654.XA CN103498838B (en) | 2013-10-11 | 2013-10-11 | A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure |
Publications (2)
| Publication Number | Publication Date |
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| CN103498838A CN103498838A (en) | 2014-01-08 |
| CN103498838B true CN103498838B (en) | 2016-04-20 |
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| CN201310472654.XA Active CN103498838B (en) | 2013-10-11 | 2013-10-11 | A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754819B (en) * | 2014-01-21 | 2015-10-21 | 清华大学 | The preparation method of flexible MEMS resistance reducing covering |
| CN103821801B (en) * | 2014-02-23 | 2016-02-10 | 中国科学院工程热物理研究所 | A kind of drag reduction rib |
| CN106945782A (en) * | 2017-04-10 | 2017-07-14 | 江苏科技大学 | The drag reduction surface under water and preparation method of a kind of imitative filefish epidermis morphology |
| CN108327894B (en) * | 2017-12-29 | 2021-07-06 | 西北工业大学 | Sand ridge simulating pneumatic resistance reducing tongue-shaped microstructure |
| CN109681496B (en) * | 2018-12-28 | 2021-02-09 | 吉林大学 | Bionic drag reduction surface structure suitable for fluid medium and manufacturing method thereof |
| CN111104716B (en) * | 2019-12-09 | 2021-09-10 | 北京航空航天大学 | Automatic generation method of groove type resistance reducing structure based on thermal diffusion facing to blade |
| CN113000845B (en) * | 2021-02-07 | 2023-08-22 | 江苏科技大学 | Bionic drag reduction surface and manufacturing method thereof |
| CN113247173B (en) * | 2021-06-30 | 2022-06-21 | 北京航空航天大学 | Multifunctional structure for reducing drag and noise, and preparation method and application thereof |
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| CN101457767A (en) * | 2008-12-02 | 2009-06-17 | 吉林大学 | Bionic elastic barrier surface connected with fluid |
| CN102272001A (en) * | 2009-01-29 | 2011-12-07 | 波音公司 | Rigid tipped riblets |
| CN102536972A (en) * | 2012-02-21 | 2012-07-04 | 吉林大学 | Dynamic coupling bionic function surface with efficiency enhancement and resistance reduction functions in liquid medium |
| CN203584973U (en) * | 2013-10-11 | 2014-05-07 | 吉林大学 | Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133516A (en) * | 1985-05-31 | 1992-07-28 | Minnesota Mining And Manufacturing Co. | Drag reduction article |
| US5848769A (en) * | 1996-08-26 | 1998-12-15 | Minnesota Mining & Manufacturing Company | Drag reduction article |
| JP5476639B2 (en) * | 2008-06-30 | 2014-04-23 | 公益財団法人北九州産業学術推進機構 | Flow resistance reduction structure |
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2013
- 2013-10-11 CN CN201310472654.XA patent/CN103498838B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457767A (en) * | 2008-12-02 | 2009-06-17 | 吉林大学 | Bionic elastic barrier surface connected with fluid |
| CN102272001A (en) * | 2009-01-29 | 2011-12-07 | 波音公司 | Rigid tipped riblets |
| CN102536972A (en) * | 2012-02-21 | 2012-07-04 | 吉林大学 | Dynamic coupling bionic function surface with efficiency enhancement and resistance reduction functions in liquid medium |
| CN203584973U (en) * | 2013-10-11 | 2014-05-07 | 吉林大学 | Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure |
Non-Patent Citations (1)
| Title |
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| 高速动车组降阻与减重应用研发;丁叁叁;《机车电传动》;20120910(第5期);全文 * |
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| CN103498838A (en) | 2014-01-08 |
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