Underwater super-cavity producing device free of production of interferential cavity flows

Abstract

The invention discloses an underwater super-cavity producing device free of production of interferential cavity flows. An observation window is arranged on a water tank, a sealing hose is installed outside a flange hole on the side wall, one end of an emission tube is inserted into the water tank through the sealing hose and then installed at one end of an exhaust tube inside a silencing tube, an air outlet hole at the top of the silencing tube is connected with an exhaust tube, a drain hole is formed in the lower portion of the front end, a missile body ejection hole is formed in the front portion, and a support which can be used for adjusting the height of the silencing tube is fixed inside the water tank; the other end of the emission tube is connected with a high-pressure air source through a tube valve connector, a solenoid valve, a cylinder valve connector and a high-pressure air cylinder, a positioning magnet is arranged on an outer cylindrical surface of the other end of the emission tube, a missile body is installed inside a hole at the other end of the emission tube, which corresponds to the positioning magnet, and a support which can be used for adjusting the angle of the emission tube and a support which can be used for adjusting the height of the high-pressure air cylinder are fixed on the ground. According to the underwater super-cavity producing device, the mechanism study on cavity development processes free of production of disturbance sections under the conditions of different water depths and different emission angles is conducted through adjustment of different diving angles of the missile body, adjustment of different water levels of the water tank and cooperation with a flow field visualization instrument.

Description

technical field [0001] The invention relates to an experimental device for fluid dynamic behavior and characteristics, in particular to an underwater supercavitation generating device for generation of non-interfering cavitation flow. Background technique [0002] When the vehicle is running horizontally and at high speed in the water, the liquid around the vehicle will vaporize, thus creating cavitation bubbles covering the surface of the vehicle. When the vehicle is surrounded by the entire gas, we call this gas region a natural superfluous region. Cavitation, at this time, the vehicle runs in the cavity, and the resistance of the vehicle is greatly reduced. With the development of society and the advancement of science and technology, the research results related to supercavitation have been widely and importantly applied in the field of marine transportation industry and natural science, especially in military defense technology. [0003] Natural supercavitation and ven...

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Problems solved by technology

[0004] During the experiment, the gas at the front of the projectile in the launch tube enters the water earlier than the projectile under the high-speed drive of the projectile, which creates a disturbance section that interferes with the flow field and affects the initial development state of the supercavitation According to observations and studies, the turbulent flow mixed with air jets makes the supercavitation flow field more complex, and the trajectory of the projectile after entering the water is also easily affected by this turbulence section, which is not conducive to the study of the natural cavitation process.

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