Active ventilation type underwater navigation body test device

Abstract

The invention provides an active ventilation type underwater navigation body test device. The test device comprises a navigation body head, a navigation main body shell, and a navigation body base; anair conveying device is arranged in the navigation body main body, the air conveying device comprises an air setting chamber and an air inlet pipe; an upper end of the air setting chamber is connected with the air setting chamber, a lower end of the air inlet pipe penetrates the navigation body base to connect with an external pressure system; air chambers are arranged in the air setting chamber,and air holes are formed on the air chambers; channels are arranged on the navigation main body shell, and the air holes are cooperated with the channels. The test device provided by the invention iscompact in structure, convenient for operation, wide in applicable range, and capable of realizing structure simple conversion and navigation body surface ventilation; an active ventilation bubble multiphase flowing problem is explored by combining the high-speed photography techniques; the test device aims at thoroughly researching an evolution mechanism thereof, and providing valuable referenceevidence for promoting the development of the active ventilation technology.

Description

technical field [0001] The invention relates to a test device, in particular to an active ventilation type underwater vehicle test device, which belongs to the technical field of ships and ocean engineering. Background technique [0002] The underwater vehicle will produce natural cavitation phenomenon during the high-speed underwater movement, and a large number of cavitation is accompanied by the generation of natural cavitation. As the environmental pressure gradually decreases until the vehicle passes through the water surface, the cavitation will appear asymmetrical, fall off, collapse, etc., and random loads will be generated on the surface of the vehicle, causing strong impact on the vehicle, and even causing the internal instruments of the vehicle to be damaged. Failure and damage to external structures. The asymmetry of the moment will cause considerable disturbance to the attitude of the vehicle, thus affecting the motion attitude of the vehicle. In order to supp...

AI Technical Summary

Problems solved by technology

The ventilation cavitation experiment carried out in the cavitation water tunnel is to make the artificially introduced air wrap a layer of stable cavitation on the vehicle body and then conduct observation and measurement. What is observed is a steady state process, and the vehicle body is uniform. It is placed horizontally, so that the cavitation formed by artificial ventilation will be deflected by the influence of gravity, which is very different from the actual underwater launch test environment; The development of the bubble test

The aeration cavitation experiment in the water tank under normal pressure cannot meet the similarity of the number of cavities, so the fusion process of the aeration cavitation cannot be observed, and there is a big problem

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