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Manufacturing method of complex drag reduction coating with flexible wall and imitation shark skin micro-groove

A production method and shark-like technology, which are applied in the field of bionics, can solve the problems of narrow applicable speed range, poor skin forming quality, low forming efficiency, etc., and achieve low cost, strong practicability and operability, and compound reduction. High resistivity effect

Active Publication Date: 2012-02-08
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional shark-skin-like drag reduction technology imitates the micro-groove structure on shark skin scales. However, there are problems such as poor forming quality and low forming efficiency in the skin manufacturing process; and the drag reduction rate of this single drag reduction mode is not high. High, the applicable speed range is very narrow

Method used

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  • Manufacturing method of complex drag reduction coating with flexible wall and imitation shark skin micro-groove
  • Manufacturing method of complex drag reduction coating with flexible wall and imitation shark skin micro-groove
  • Manufacturing method of complex drag reduction coating with flexible wall and imitation shark skin micro-groove

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Experimental program
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Effect test

Embodiment 1

[0060] Selection of raw materials: The selected shark is a macaque. The experimental sample of the shark was purchased from Beijing Aquatic Products Company. The initial sample was in a frozen state, with a body length of 1.4m and a weight of 23Kg; 2.5% glutaraldehyde solution, different concentrations of ethanol, Acetone, deionized water, trimethylchlorosilane and other chemical reagents were purchased from Beijing Aoli Chemical Reagent Co., Ltd.; the vacuum drying oven was PZT-6020 intelligent vacuum drying oven produced by Shanghai Yiheng Technology Co., Ltd.

[0061] Step 1: Prepare negative template A6

[0062] (A) Mechanically polish a 2cm-thick pure aluminum plate (purity>99.00%) with sandpaper, and then ultrasonically clean it with acetone, ethanol, and plasma water for 5 minutes;

[0063] (B) The aluminum plate obtained in the above step is processed by an EDM high-speed small-hole machine into a group hole array with an inclination of 15°, a hole depth of 1000 μm, a ...

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Abstract

The invention relates to a manufacturing method of a complex drag reduction coating with a flexible wall and an imitation shark skin micro-groove, and the method comprises the following three major steps: a step 1) preparing a female mold plate A; a step 2) preparing a female mold plate B; and a step 3) manufacturing the complex drag reduction coating by micro-molding and stamping. By adopting the molding and stamping reproduction method, the skin morphology of a shark and a micro-column array can be simultaneously reproduced, the obtained complex drag reduction coating simultaneously has the flexible wall for drag reduction and the shark micro-groove, the complex drag reduction efficiency is high, and the practicality and the operability are stronger; and the complex drag reduction coating prepared by the method is simple in process and low in cost, and has the advantages of better practical value and broad application prospects in the technical field of biological bionics.

Description

technical field [0001] The invention relates to a method for making a composite drag-reducing skin with flexible walls and imitation shark skin micro-grooves, more particularly, refers to a method for manufacturing a composite skin with flexible walls and lifelike shark scales by using micro-imprinting plastic casting technology. Bionic composite drag-reducing surface with groove structure. It belongs to the field of bionic technology. Background technique [0002] The increasingly serious energy problem makes energy saving and emission reduction an urgent need in today's society. Various drag reduction technologies, such as drag reduction with drag reducing agent, flexible wall drag reduction, and hydrophobic drag reduction, can effectively reduce aircraft resistance, increase speed, and save energy, which is of great significance to national economy and national defense security. [0003] The shark known as the "shark skin effect" has a non-smooth grooved drag-reducing s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B29C33/38
CPCB29C67/00B29C59/022B29C2059/023
Inventor 陈华伟尚晓朋张景建马灵犀张德远
Owner BEIHANG UNIV
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