Shark intimating covering having self-lubricating groove and composite anti-drag function and manufacturing method thereof

Abstract

The invention discloses an artificial shark skin with function of self-lubricating groove complex drag reduction. The artificial shark skin in a copying way is provided with micron-size grooves which have self-lubricating function. The artificial shark skin is made from waterborne epoxy resin and polyacrylamide aqueous solution, wherein 50-70g of the polyacrylamide aqueous solution is added to 10g of the waterborne epoxy resin; the waterborne epoxy resin consists of waterborne epoxy resin emulsion and waterborne epoxy resin curing agent and is a bi-component epoxy resin. The process for manufacturing the artificial shark skin fully proves that the drag reduction mechanism of the shark skin can be simulated from the two aspects of high-fidelity groove shape and self-lubricating mucus by the biological copy-forming technology, thus realizing double bionics of geometric attributes and interface attributes of low-resistance organism surface, which is to become the development trend of the bionic drag reduction surface manufacture technology in the future and has wide application prospect.

Description

technical field [0001] The invention relates to a shark-like skin and a manufacturing method thereof, more particularly, to a shark-like skin with self-lubricating groove composite drag-reducing functions made of hydrophilic materials and a manufacturing method thereof. Background technique [0002] Shark-like drag-reducing surface manufacturing technology with shark-like scale grooves and body surface mucus as the core content is one of the hot and difficult points of current research. [0003] Sharks known as the "shark skin effect" have evolved through continuous self-adaptation, self-learning and self-organization to meet their own survival needs and to reasonably regulate the external fluid medium. The non-smooth grooved drag-reducing surface. It relies on micron-scale scale grooves and mucus secretion to achieve high-speed cruising and fast maneuvering. For this reason, people have tried various means to imitate or reproduce the drag reduction effect of shark skin, bu...

AI Technical Summary

Problems solved by technology

[0005] The traditional manufacturing process of the shark-like grooved drag-reducing surface has problems such as poor molding quality, low forming efficiency, high manufacturing cost, and poor functional effect. In addition, the drag reduction rate of the grooved drag-reducing surface can only reach about 8%. It is difficult to further increase the drag reduction rate by relying on grooves for drag reduction; the existing drag reduction methods have problems such as large waste of drag reducers, low utilization rate, and continuous addition; in addition, the existing drag reduction Coatings are difficult to combine with drag reduction grooves. Generally, simple mechanical superposition methods are often used, and it is difficult to achieve a significant increase in drag reduction rate.

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