Fusiform bionic microstructure with drag reduction characteristics

A microstructure and shuttle-shaped technology, applied in the field of microstructure functional materials, can solve problems such as process complexity and immature research

Inactive Publication Date: 2018-08-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two are caused by the shape of the object, which can be improved by optimizing the shape structure, and the research in this area has been perfected day by day; while the frictional resistance comes from the interaction between the surface of the object and the surrounding fluid, which can be improved through the structure and performance of the surface layer of the object. Improvement and surface microstructure regulation to improve, but due to the complexity of the process, related research is not very mature

Method used

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  • Fusiform bionic microstructure with drag reduction characteristics
  • Fusiform bionic microstructure with drag reduction characteristics
  • Fusiform bionic microstructure with drag reduction characteristics

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0019] Both the shuttle-shaped structure layer and the base material layer are made of PDMS (polydimethylsiloxane). The overall length of the fusiform structure is 48 microns, the width is 24 microns, and the height is 24 microns. The radius of curvature of the arc end is 12 microns, and the included angle of the pointed end is 75°. The fusiform structures are arranged along the curve on the horizontal plane on the base material with a smooth surface. The distance between adjacent fusiform structures on the same curve is 88 microns, and the distance between adjacent curves is 100 microns. The arrangement and position of the upper shuttle-shaped structures are the same.

specific Embodiment approach 2

[0020] Both the shuttle structure layer and the base material layer are made of aluminum alloy. The overall length of the fusiform structure is 52 microns, the width is 28 microns, the height is 24 microns, the radius of curvature of the arc end is 16 microns, and the included angle of the pointed end is 78°. The shuttle-shaped structures are arranged on the base material along the curve on the horizontal plane. The surface of the base material is a plane with a certain roughness. The distance between adjacent shuttle-shaped structures on the same curve is 90 microns, and the distance between adjacent curves is 98 microns. The arrangement of the fusiform structures on the adjacent curves is the same, but the corresponding fusiform structures on the adjacent curves are staggered, and the dislocation distance is 12 microns.

specific Embodiment approach 3

[0021] Both the shuttle structure layer and the base material layer are made of photoresist material. The overall length of the fusiform structure is 52 microns, the width is 28 microns, the radius of curvature of the arc end is 16 microns, and the included angle of the pointed end is 78°. The fusiform structures are arranged along smooth curves, and the curves are distributed on the horizontal plane. The surface of the base material is a corrugated surface with a peak-to-trough distance of 20 microns and a wave period of 200 microns, and the distance from the upper surface of the shuttle-shaped structure to a certain contour is the same. The distance between adjacent fusiform structures on the same curve is 90 microns, the distance between adjacent curves is 98 microns, and the arrangement and position of the fusiform structures on adjacent curves are the same.

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Abstract

The invention discloses a fusiform bionic microstructure with drag reduction characteristics, and belongs to the field of microstructure functional materials. The structure comprises: (a) a fusiform structural layer, and (b) a substrate material layer, wherein a plurality of fusiform structural bodies are arranged on the substrate material layer in a certain arrangement rule to form the fusiform structural layer. On end of the fusiform structural body is a sharp corner, the other end of the fusiform structural body is a circular curved surface, each sharp corner is connected with the circularcurved surface through a smooth curved surface, and the sharp corner ends of the fusiform structural bodies face to the same direction. The fusiform microstructure based on a surface layer microstructure of an alpine fargesia leaf provided by the invention can significantly reduce the surface friction resistance and effectively improve the aerodynamic performance of a solid flow contact layer, sothat the fusiform bionic microstructure can be widely applied to the field of modern engineering.

Description

technical field [0001] The invention relates to the field of microstructure functional materials, in particular, it provides a fusiform microstructure imitating alpine arrow bamboo leaves with drag-reducing properties. Background technique [0002] Fast and high performance has become an inevitable requirement for the development of modern science and technology. At the same time, with the development of modern society and the advancement of ecological civilization construction, the concept of green, energy-saving and sustainable development has gradually become the main theme of human social development. The data shows that for ships, airplanes and other vehicles, the largest energy consumption is to overcome the resistance caused by friction with the fluid medium; a considerable part of the energy loss in fluid transmission is to overcome the friction resistance between the fluid and the transmission equipment . According to statistics, the surface friction resistance acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81B1/00
CPCB81B1/00
Inventor 苑伟政何洋吕湘连卢宇超刘谦王圣坤
Owner NORTHWESTERN POLYTECHNICAL UNIV
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