A low-resistance self-adaptive suction flow control device and method with silencing function

Abstract

The invention discloses a low-resistance self-adaptive flow-absorbing control device and method with a noise eliminating function, and belongs to the field of acoustic measurement. The device comprises a round tube, thin films, sleeves, a pressurizer, a pressure gauge and a pressure sensor; small through holes are formed in the surface of the round tube, the thin films are attached to the outer surface of the round tube, the sleeves and the round tube are arranged coaxially, the sleeves and the outer surface of the round tube form a closed system, the pressure gauge is located on the outer sides of the sleeves, the pressure gauge is located on the outer sides of the sleeves, and the pressure sensor is located on the inner surface of the inflow end and the outflow end of the round tube. Themethod comprises the following steps that the pressure intensity of fluid in the round tube is obtained through an interpolation method; the pressure intensity which needs to be applied to the surfaces of the thin films is obtained through calculation; and the pressure intensity is adjusted to be the sum of the flowing pressure of the small through holes and the pressure of the surfaces of the thin films. According to the low-resistance self-adaptive flow-absorbing control device and method with the noise eliminating function, the problem of large resistance and high noise caused by flowing in the round tube is solved, and the sound stealth performance of underwater vehicles such as a submarine and a torpedo can be improved.

Description

technical field [0001] The invention relates to a low-resistance self-adaptive suction flow control device and method with noise reduction function, belonging to the field of acoustic measurement. Background technique [0002] In recent years, in order to reduce the hydrodynamic noise of underwater vehicles such as submarines and torpedoes, passive flow control technologies such as fillets, vortex suppressors, and flat grilles have been developed. Energy is injected into the field, but because the control method cannot change in real time with the state of the incoming flow, the purpose of reducing hydrodynamic noise cannot be achieved when the flow rate is high and the angle of attack is large. In order to improve the effect of controlling hydrodynamic noise, there are also active flow control technologies represented by adaptive suction flow, zero-mass jet flow, and electromagnetic force. This technology injects energy into the flow field, especially into the boundary laye...

AI Technical Summary

Problems solved by technology

The above-mentioned methods of suppressing flow noise do not consider how to reduce the flow resistance in the catheter. They are methods that only treat the symptoms but not the root cause, and cannot meet the application of adaptive suction technology in engineering.

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