CN103498838A - Bionic resistance-reducing noise-reducing surface of rigid and flexible structure - Google Patents
Bionic resistance-reducing noise-reducing surface of rigid and flexible structure Download PDFInfo
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- CN103498838A CN103498838A CN201310472654.XA CN201310472654A CN103498838A CN 103498838 A CN103498838 A CN 103498838A CN 201310472654 A CN201310472654 A CN 201310472654A CN 103498838 A CN103498838 A CN 103498838A
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Abstract
The invention discloses a bionic resistance-reducing noise-reducing surface of a rigid and flexible structure. The bionic resistance-reducing noise-reducing surface of the rigid and flexible structure is formed by alternatively distributing rigid ribs and flexible strips on a rigid surface, the section of each rigid rib is semicircular or triangular or semielliptical or the like, each rigid rib is higher than each flexible strip by 0.2-5mm, the interval between the rigid ribs is 1-15mm, and the thickness of each flexible strip is 0.5-4mm. Middle grooves formed by the rigid ribs on the rigid surface can limit the extensible motion of a streamwise vortex, bursting intensity of turbulence on a wall surface is lowered, and frictional resistance of the wall surface is lowered. A flexible strip wall surface between every two rigid ribs can reduce pulse pressure generated by the turbulence on the wall surface, the frequency of falling of the vortex on the wall surface is suppressed, frictional resistance is further reduced, and flowing noise is reduced.
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.Other take dynamic power machine that fluid is working medium as huge problems of energy consumption that also ubiquity causes due to surface friction drag such as fluid pump, long distance pipeline and hydraulic machinery systems.Reduce the surface friction drag of means of transportation and other dynamic power machine, improving headway and working efficiency is the great demand that national energy-saving reduces discharging strategy.
In recent decades, the researcher by wall processing can not configuration of surface, play to a certain extent the effect that reduces surface friction drag.The special construction that the present invention is formed by rigidity fin ray and flexible skin by fin inspires, and has proposed a kind of hard and soft alternate bionic, drag-reducing surface.Following current can significantly reduce the surface friction drag of object in flowing medium to this surface of layout, and can suppress aerodynamic noise.
Summary of the invention
The present invention consists 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 the 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) the middle groove that the stiff rib bar of rigid surface forms can limit flow to whirlpool exhibition to motion, make wall Turbulence-bursting weakened, reduced 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, further reduces surface friction drag, reduces hydrodynamic noise.
The accompanying drawing explanation
The schematic cross-section that Fig. 1 is first embodiment of the invention.
The schematic cross-section that Fig. 2 is second embodiment of the invention.
The schematic cross-section that Fig. 3 is third embodiment of the invention.
The unit schematic cross-section that Fig. 4 is first embodiment of the invention.
The unit schematic cross-section that Fig. 5 is second embodiment of the invention.
The unit schematic cross-section that Fig. 6 is 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 rigidity rib 1 and staggered the distributing alternately of flexible strip 2, to consist of 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 rigidity rib 1 and staggered the distributing alternately of flexible strip 2, to consist of on rigid surface, the sectional shape of rigidity rib 1 is triangle, its triangle apex 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 rigidity rib 1 and staggered the distributing alternately of flexible strip 2, to consist of on rigid surface, the sectional shape of rigidity rib 1 is half elliptic, its oval major axis a 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 (3)
1. the bionic, drag-reducing noise reduction surface of a hard and soft interphase structure, be characterised in that: be rigidity rib and staggered the distributing alternately of flexible strip, to consist of on rigid surface.
2. the bionic, drag-reducing noise reduction surface of a kind of hard and soft interphase structure according to claim 1 is characterised in that: the sectional shape of described rigidity rib is semicircle, triangle or semiellipse.
3. the bionic, drag-reducing noise reduction surface of a kind of hard and soft interphase structure according to claim 1 and 2, be characterised in that: described 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.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| Publication Number | Publication Date |
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| CN103498838A true CN103498838A (en) | 2014-01-08 |
| CN103498838B CN103498838B (en) | 2016-04-20 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754819A (en) * | 2014-01-21 | 2014-04-30 | 清华大学 | Preparation method of flexible anti-drag skin of micro-electromechanical system (MEMS) |
| CN103821801A (en) * | 2014-02-23 | 2014-05-28 | 中国科学院工程热物理研究所 | Resistance reducing 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 |
| CN108327894A (en) * | 2017-12-29 | 2018-07-27 | 西北工业大学 | A kind of imitative longitudinal dune pneumatic drag reduction ligulate micro-structure |
| CN109681496A (en) * | 2018-12-28 | 2019-04-26 | 吉林大学 | A kind of bionic, drag-reducing surface texture and its manufacturing method suitable for fluid media (medium) |
| CN111104716A (en) * | 2019-12-09 | 2020-05-05 | 北京航空航天大学 | Automatic generation method of groove type resistance reducing structure based on thermal diffusion facing to blade |
| CN113000845A (en) * | 2021-02-07 | 2021-06-22 | 江苏科技大学 | Bionic drag reduction surface and manufacturing method thereof |
| CN113247173A (en) * | 2021-06-30 | 2021-08-13 | 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 |
| JP2010007846A (en) * | 2008-06-30 | 2010-01-14 | Kitakyushu Foundation For The Advancement Of Industry Science & Technology | Flow resistance reducing structure |
| CN102272001A (en) * | 2009-01-29 | 2011-12-07 | 波音公司 | Rigid tipped riblets |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103754819A (en) * | 2014-01-21 | 2014-04-30 | 清华大学 | Preparation method of flexible anti-drag skin of micro-electromechanical system (MEMS) |
| CN103754819B (en) * | 2014-01-21 | 2015-10-21 | 清华大学 | The preparation method of flexible MEMS resistance reducing covering |
| CN103821801A (en) * | 2014-02-23 | 2014-05-28 | 中国科学院工程热物理研究所 | Resistance reducing rib |
| 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 |
| CN108327894A (en) * | 2017-12-29 | 2018-07-27 | 西北工业大学 | A kind of imitative longitudinal dune pneumatic drag reduction ligulate micro-structure |
| CN109681496A (en) * | 2018-12-28 | 2019-04-26 | 吉林大学 | A kind of bionic, drag-reducing surface texture and its manufacturing method suitable for fluid media (medium) |
| 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 |
| CN111104716A (en) * | 2019-12-09 | 2020-05-05 | 北京航空航天大学 | Automatic generation method of groove type resistance reducing structure based on thermal diffusion facing to blade |
| CN113000845A (en) * | 2021-02-07 | 2021-06-22 | 江苏科技大学 | Bionic drag reduction surface and manufacturing method thereof |
| CN113000845B (en) * | 2021-02-07 | 2023-08-22 | 江苏科技大学 | Bionic drag reduction surface and manufacturing method thereof |
| CN113247173A (en) * | 2021-06-30 | 2021-08-13 | 北京航空航天大学 | Multifunctional structure for reducing drag and noise, and preparation method and application 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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| CN103498838B (en) | 2016-04-20 |
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