Adaptive electrode wall surface micro-nano pit micro-bubble generating device and manufacturing method thereof

Abstract

An adaptive electrode wall surface micro-nano pit and micro-bubble generating device and a manufacturing method thereof relate to the technical field of active drag reduction of underwater vehicles, including a substrate and a DC power supply, wherein the surface of the substrate is provided with electrode wall micro-nano pits, and an electrode The wall surface of the micro-nano pit on the wall surface and the upper surface of the base body are provided with a sputtered metal layer, the sputtered metal layer on the upper surface of the base body is covered with photoresist, and the sputtered metal layer is connected to the negative electrode of the DC power supply through a power supply wire. By electrolyzing the NaCl solution, self-adaptive replenishment of microbubbles can be achieved without continuous and long-term ventilation. When the microbubbles burst or the gas-liquid interface is lower than the upper end of the laid sputtered metal negative electrode, the device automatically triggers the electrolysis circuit to realize the microbubble. The adaptive control is suitable for surface ships and underwater vehicles; it can stably maintain microbubbles, which is beneficial to practical applications.

Description

technical field [0001] The invention relates to the technical field of active drag reduction for underwater vehicles, in particular to a device for generating micro-nano pits and micro-bubbles on an adaptive electrode wall surface and a manufacturing method thereof. Background technique [0002] At present, the drag reduction technologies based on the wall surface mainly include flexible wall drag reduction, coating drag reduction, surface topography drag reduction, etc. The basic method is to reduce the frictional resistance of the fluid and the wall by improving the flow field environment of the wall surface. ; Another drag reduction technology is micro-bubble drag reduction. Micro-bubble drag reduction can also be called air layer and cavitation drag reduction. It is to create bubbles on the surface of the object to achieve the effect of drag reduction and noise reduction, that is, by orbiting the aircraft Air is released from small holes in the laid air pipeline to produ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the micro-bubble drag reduction technologies use the technology of spraying micro-bubbles directly into the water to directly form micro-bubbles on the wall surface, but this technology needs to continuously ventilate the surface of the vehicle for a long time, which consumes a lot of energy

At the same time, there is another technology of electrolyzing water to generate microbubbles. It is difficult for the generated microbubbles to reside stably on the surface of the vehicle. Moreover, it is difficult to control the size of microbubbles, and these factors have a great influence on the drag reduction rate of microbubbles

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