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Bionic resistance-reducing noise-reducing surface of rigid and flexible structure

A resistance drop, rigid and flexible technology, applied in the direction of mechanical equipment, fluid flow, etc., can solve problems such as huge energy consumption, achieve the effects of reducing flow noise, reducing frictional resistance, and suppressing frequency

Active Publication Date: 2014-01-08
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Other power machinery using fluid as working medium, such as fluid pumps, long-distance pipelines and hydraulic mechanical systems, also generally have the problem of huge energy consumption due to frictional resistance.

Method used

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  • Bionic resistance-reducing noise-reducing surface of rigid and flexible structure

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Embodiment Construction

[0015] see figure 1 and Figure 4 As shown, it is the first embodiment of the present invention. This embodiment is composed of rigid ribs 1 and flexible strips 2 alternately distributed on the rigid surface. The cross-sectional shape of the rigid rib 1 is semicircular, and its radius R is 3mm. The spacing L between the rigid ribs 1 is 10mm, and the thickness N of the flexible strips 2 is 2mm.

[0016] see figure 2 and Figure 5 As shown, it is the second embodiment of the present invention. This embodiment is composed of rigid ribs 1 and flexible strips 2 distributed alternately and alternately on the rigid surface. The cross-sectional shape of the rigid rib 1 is triangular, and its triangular vertex angle α is 60° , the height H from the apex to the bottom is 5mm, the distance L between the rigid ribs 1 is 8mm, and the thickness N of the flexible strip 2 is 2mm.

[0017] see image 3 and Image 6 Shown is the third embodiment of the present invention. This embodiment ...

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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 [0001] The invention relates to a surface structure, in particular to a bionic drag-reducing and noise-reducing surface with a rigid-flexible structure. Background technique [0002] The main energy consumption of high-speed ground vehicles, aircraft and other underwater vehicles is to overcome the frictional resistance of the fluid medium. Other power machines that use fluid as a working medium, such as fluid pumps, long-distance pipelines, and hydraulic mechanical systems, also generally have the problem of huge energy consumption due to frictional resistance. Reducing the frictional resistance of transportation tools and other power machinery, and improving navigation speed and work efficiency are major demands of the national energy-saving and emission-reduction strategy. [0003] In recent decades, researchers have reduced the frictional resistance to a certain extent by processing impossible surface morphology on the wall. Inspired by the special stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15D1/12
Inventor 王晶张成春章甘李雪丽王现宝任露泉
Owner JILIN UNIV
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