CN203584973U - Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure - Google Patents
Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure Download PDFInfo
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- CN203584973U CN203584973U CN201320626572.1U CN201320626572U CN203584973U CN 203584973 U CN203584973 U CN 203584973U CN 201320626572 U CN201320626572 U CN 201320626572U CN 203584973 U CN203584973 U CN 203584973U
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Abstract
The utility model discloses a bionic resistance reducing noise lowering surface of a stiffness and flexibility combining structure. The surface is formed by rigid ribs and flexible ribs in a staggered mode on a rigid surface, the section shape of each rigid rib is semicircular, triangular or semielliptical, the rigid ribs are 0.2 mm-5 mm higher than the flexible ribs, the distance between the rigid ribs ranges from 1 mm to 15 mm, and the thickness of each flexible rib ranges from 0.5 mm to 4 mm. Middle grooves formed by the rigid ribs on the rigid surface can limit the expanding movement of streamwise vortexes, so that wall side turbulence burst intensity becomes weaker, and wall face friction resistance is lowered; a flexible rib wall face between two rigid ribs can reduce fluctuating pressure generated by wall face turbulence burst and inhibit the shedding frequency of wall face vortexes, the friction resistance is further reduced, and flow noise is lowered.
Description
Technical field
The utility model 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, 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 utility model 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.
Model utility content
The utility model is rigidity rib and staggered the distributing alternately of flexible strip, to consist of 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 beneficial effects of the utility model are:
(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.
Accompanying drawing explanation
Fig. 1 is the utility model the first embodiment's schematic cross-section.
Fig. 2 is the utility model the second embodiment's schematic cross-section.
Fig. 3 is the utility model the 3rd embodiment's schematic cross-section.
Fig. 4 is the utility model the first embodiment's unit schematic cross-section.
Fig. 5 is the utility model the second embodiment's unit schematic cross-section.
Fig. 6 is the utility model the 3rd embodiment's unit schematic cross-section.
Embodiment
Refer to shown in Fig. 1 and Fig. 4, for the first embodiment of the present utility model, 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 utility model, 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 3rd embodiment of the present utility model, 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. a bionic, drag-reducing noise reduction surface for hard and soft interphase structure, is 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, is 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626572.1U CN203584973U (en) | 2013-10-11 | 2013-10-11 | Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626572.1U CN203584973U (en) | 2013-10-11 | 2013-10-11 | Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203584973U true CN203584973U (en) | 2014-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320626572.1U Withdrawn - After Issue CN203584973U (en) | 2013-10-11 | 2013-10-11 | Bionic resistance reducing noise lowering surface of stiffness and flexibility combining structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203584973U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498838A (en) * | 2013-10-11 | 2014-01-08 | 吉林大学 | Bionic resistance-reducing noise-reducing surface of rigid and flexible structure |
| CN115258033A (en) * | 2022-08-03 | 2022-11-01 | 青岛科技大学 | Micro-groove bionic drag reduction structure and preparation method thereof |
-
2013
- 2013-10-11 CN CN201320626572.1U patent/CN203584973U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498838A (en) * | 2013-10-11 | 2014-01-08 | 吉林大学 | Bionic resistance-reducing noise-reducing surface of rigid and flexible structure |
| CN103498838B (en) * | 2013-10-11 | 2016-04-20 | 吉林大学 | A kind of bionic, drag-reducing noise reduction surface of hard and soft interphase structure |
| CN115258033A (en) * | 2022-08-03 | 2022-11-01 | 青岛科技大学 | Micro-groove bionic drag reduction structure and preparation method thereof |
| CN115258033B (en) * | 2022-08-03 | 2023-09-15 | 青岛科技大学 | Micro-groove bionic drag reduction structure and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140507 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |