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Array electrode type flat plate wall micro-cavity generating device

A technology of array electrode and generating device, which is applied in the field of changing the inherent hydrodynamic characteristics of the ship hull, and the micro-cavitation generating device on the wall of flat sample, can solve the problems such as the influence of drag reduction rate, and achieve the effect of controllable formation speed

Inactive Publication Date: 2009-05-27
TSINGHUA UNIV
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  • Description
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Problems solved by technology

However, it is difficult to control the size of the bubbles and the degree of adsorption of the bubbles on the wall in the jet microbubble technology, and these two factors have been proved to have a great impact on the drag reduction rate in experiments

Method used

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  • Array electrode type flat plate wall micro-cavity generating device
  • 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] figure 1 Schematic diagram of the structure of an embodiment of an array electrode type flat wall microcavity generating device provided by the present invention. The generating device is composed of a three-layer structure of the top layer 1, the middle layer 2 and the bottom layer 3. The top layer is a gold-plated copper layer , at the same time 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 range is 50-500 microns, the hole wall is coated 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 fills the micropores, thereby reducing th...

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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, in particular to a technical measure for changing the inherent hydrodynamic characteristics of a ship hull through air bubbles or an air layer, 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 tec...

Claims

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Application Information

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Patent Type & Authority Patents(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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