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Array electrode type flat plate wall micro-cavity generating device

An array electrode and generating device technology, which is applied in the field of flat sample wall micro-cavitation generating devices, can solve problems such as the influence of drag reduction rate, and achieve the effect of controllable forming speed

Inactive Publication Date: 2008-02-13
TSINGHUA UNIV
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Problems solved by technology

[0003] At present, wall-based drag reduction technologies mainly include flexible wall drag reduction, coating drag reduction, surface topography drag reduction, etc. The basic method is to reduce the frictional resistance of fluid and wall by improving the flow field environment of the wall surface; One technology is to form a solid-gas-liquid three-phase between the wall and the fluid by spraying microbubbles into the water, thereby achieving a high drag reduction rate; The control of the degree of wall adsorption, and these two factors have been proved to have a great influence on the drag reduction rate in experiments

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  • Array electrode type flat plate wall micro-cavity generating device

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Embodiment Construction

[0012] The following structural drawings further illustrate the specific implementation and working principle of the present invention.

[0013] Fig. 1 is the structure schematic diagram of the embodiment of array electrode type plate wall surface microcavitation generation device provided by the present invention, and this generation device is made of top layer 1, middle layer 2 and bottom layer 3 three-layer structure by this device, and described top layer is gold-plated The copper layer is also used as the positive electrode of the power supply; the middle layer is an insulating layer, and polytetrafluoroethylene can be used as the insulating layer. The diameter of the hole is in the range of 50-500 microns, and the hole wall is covered with copper and connected to the bottom layer; the bottom layer is a copper layer, which is used as the negative pole of the power supply.

[0014] The device mainly produces bubbles on the microporous cathode by electrolyzing water, and fi...

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Abstract

A micro vacuole generating device of a flat slab wall surface of array electrode type is used to reduce the frication resistance for the wall surface, belonging to the technical field of the fluid dynamics. The device consists of a top layer, a middle layer and a bottom layer. The top layer is gilded copper layer and serves as the anode of the power supply. The middle layer is a polyfluortetraethylene layer, serving as an insulated layer. The bottom layer is a copper layer, serving as the cathode of the power supply. The insulated layer is provided with millipores which are distributed to be arrays and the diameter is between 50 microns and 500 microns. The wall of the millipores is coated with the copper and connected with the bottom layer. The millipore shape is formed on the wall surface and the electrodes are distributed in the millipores shape. A water-electrolytic way is used to produce the micro vacuoles and consequently the distributed adsorption vacuoles are formed on the wall surface. In this way higher drag reduction efficiency can be achieved.

Description

technical field [0001] The invention relates to a microcavitation generating device on the wall surface of a flat sample, which is used for reducing the frictional resistance of the wall surface and belongs to the technical field of fluid dynamics. Background technique [0002] The main energy consumption of an underwater vehicle traveling in water is to overcome the traveling resistance, so resistance analysis and resistance reduction are of great significance for saving energy, improving working conditions and improving work efficiency. The traveling resistance of an underwater vehicle is mainly composed of frictional resistance and pressure difference resistance, and the frictional resistance accounts for the vast majority of the total resistance. Therefore, reducing the frictional resistance of the wall is the key to reducing the traveling resistance. [0003] At present, wall-based drag reduction technologies mainly include flexible wall drag reduction, coating drag red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B1/38
CPCY02T70/122Y02T70/10
Inventor 汪家道陈皓生陈大融
Owner TSINGHUA UNIV
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