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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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 8
- 230000016507 interphase Effects 0.000 claims description 5
- 230000010349 pulsation Effects 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本实用新型公开了一种刚柔相间结构的仿生减阻降噪表面，其是在刚性表面上由刚性肋条和柔性条交错相间分布构成；所述的刚性肋条的截面形状为半圆形、三角形或半椭圆等，刚性肋条高于柔性条0.2～5mm，刚性肋条的间距为1～15mm，柔性条的厚度为0.5～4mm。刚性表面的刚性肋条形成的中间沟槽可以限制流向涡的展向运动，使壁面湍流猝发强度变弱，降低了壁面摩擦阻力；两刚性肋条间的柔性条壁面可以减小壁面湍流猝产生的脉动压力，抑制壁面涡脱落的频率，进一步减小摩擦阻力，降低流动噪声。
The utility model discloses a bionic drag-reducing and noise-reducing surface with a rigid-flexible structure, which is composed of rigid ribs and flexible strips distributed alternately and alternately on the rigid surface; the cross-sectional shape of the rigid ribs is semicircular, triangular Or semi-elliptical, etc., the rigid ribs are 0.2-5mm higher than the flexible strips, the spacing of the rigid ribs is 1-15mm, and the thickness of the flexible strips is 0.5-4mm. The middle groove formed by the rigid ribs on the rigid surface can limit the spanwise movement of the flow vortex, weaken the wall turbulent burst strength, and reduce the wall frictional resistance; the flexible strip wall between the two rigid ribs can reduce the pulsation generated by the wall turbulent burst Pressure, suppress the frequency of vortex shedding on the wall, further reduce frictional resistance, and reduce flow noise.
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 Expired - Lifetime 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 Expired - Lifetime
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 | A micro-groove bionic drag reduction structure and its preparation method |
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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 |