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Cylindrical channel type underwater multiphase jet noise reduction and noise reduction device

A cylindrical and channel technology, which is applied in the field of cylindrical channel underwater multiphase jet noise reduction and noise reduction devices, can solve the problems of multiphase jet noise reduction devices that have not been found, and achieve the effect of compact structure and elimination of air flow pulsation

Active Publication Date: 2016-08-24
山东山科励睿科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] No multiphase jet noise reduction device for high-speed gas jets of underwater vehicles has been found so far

Method used

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  • Cylindrical channel type underwater multiphase jet noise reduction and noise reduction device
  • Cylindrical channel type underwater multiphase jet noise reduction and noise reduction device
  • Cylindrical channel type underwater multiphase jet noise reduction and noise reduction device

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Embodiment Construction

[0039] The present invention is described in detail below in conjunction with accompanying drawing:

[0040] figure 1 The overall figure shown has: shell 1, outlet inner snap ring 2, flower-shaped folded guide pipe 3, positioning inner snap ring 4, rear snap ring 5, annular orifice plate 6, rear nozzle pipe 7, front Arranged nozzle 8, front snap ring 9, blade 10, inner conduit 11, front finned plate 12, rear finned tube 13, multi-hole nozzle 14, tapered V-shaped nozzle 15.

[0041] The shell 1 is the shell of the underwater multiphase jet noise reduction and noise reduction device, and all components are wrapped in it;

[0042] The flower-shaped folded guide tube 3 is installed on the outlet end of the housing 1, and is positioned by the outlet inner snap ring 2 and the positioning inner snap ring 4;

[0043] The four corresponding round holes on the front side of the ring plate of the annular orifice plate 6 are welded with the rear nozzle 7, and the annular orifice plate 6...

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Abstract

Cylindrical tunnel type underwater multi-phase jet noise reduction device, including a tubular shell, the outer wall of which has four through holes in the circumferential direction, a tapered nozzle is fixed inside the shell, the front end of the tapered nozzle is an annular orifice plate, the middle part It is a cylindrical section, and the rear end is a tapering nozzle. Four through holes are opened in the circumferential direction of the outer wall of the cylindrical section. The cross-section is tangent; the annular orifice plate is connected with the front nozzle, the inner conduit is fixed on the inner wall of the tapered nozzle on the axis of the shell, the front part of the inner conduit is provided with blades, and a porous nozzle is fixed on the inner wall of the outlet end of the inner conduit . The invention is used for the exhaust of underwater vehicles. The device has a compact structure, can be directly installed in the exhaust pipe system, does not occupy external space, eliminates air pulsation, turbulent jet noise and bubble noise, and the noise reduction frequency range is from pulsation to low frequency 200Hz. Up to the high frequency 5000Hz generated by turbulent jet flow, the noise reduction effect is above 18dB.

Description

technical field [0001] The invention relates to a cylindrical channel type underwater multi-phase jet noise elimination and noise reduction device, which is used for noise reduction of waste gas emission in thermal power systems of underwater vehicles. Background technique [0002] The high-pressure and high-temperature exhaust gas discharged from the thermal power system of the underwater vehicle is discharged into the water through the nozzle, forming serious jet noise. Since the propagation of sound depends on the compressibility of the medium, the speed of sound in water is usually about 4.4 times the speed of sound in air, and the propagation speed of underwater noise is much greater than the speed of underwater vehicles. When a large amount of exhaust gas generated by the thermal power device of the underwater vehicle is discharged into the water at high speed through the outlet pipe, a complex gas flow, gas-liquid two-phase flow field structure is formed, accompanied ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/12F01N1/18F01N1/00
Inventor 郝宗睿别海燕徐娟
Owner 山东山科励睿科技有限公司
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