Method for determining noise source position and noise directivity of high-parameter pressure-reducing valve

Abstract

The invention discloses a method for determining the noise source position and the noise directivity of a high-parameter pressure-reducing valve, and the method is used to position a sound source of the high-parameter pressure-reducing valve under complex condition. The method comprises that hydrodynamics software is used to establish compressible flow value models of the high-parameter pressure-reducing valve; flow field distribution of the high-parameter pressure-reducing valve without an orifice plate and the high-parameter pressure-reducing valve with an orifice plate is solved via a basic control equation or a large eddy simulation turbulent flow model equation; the sound power level distribution maps in the symmetrical planes of the two models are obtained via calculation of the stable state flow field; noise source positions of the two models are obtained via stable state analysis; the noise directivity is determined by utilizing sound pressure monitoring points arranged in the downstream of an outlet of the high-parameter pressure-reducing valve; and noise directivity distribution maps of the two models are obtained. According to the invention, the noise source can be found accurately and effectively, and reliable basis is provided for noise reduction in a targeted manner.

Description

【Technical field】 [0001] The invention relates to the technical field of acoustics and positioning, in particular to a method for determining the position of a noise source of a high-parameter pressure reducing valve and the noise directivity. 【Background technique】 [0002] The temperature and pressure reduction device is an important device for adjusting steam pressure and temperature in the process industry. It is of great significance to meet the user's steam demand, realize the recovery and utilization of waste heat and pressure, and protect the safety of the system and equipment. The high-parameter pressure reducing valve is the core element in the temperature and pressure reduction device. With the construction and development of national key projects, domestic traditional high-parameter pressure reducing valves can no longer meet the pressure regulation, shock absorption and noise reduction under complex working conditions such as high parameters (high temperature an...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of severe gas turbulence and high noise in the existing high-parameter pressure reducing valve, the present invention proposes a method for determining the noise source position and noise directivity of the high-parameter pressure reducing valve, which can accurately and effectively find the noise source, and provide Provide a reliable basis for targeted noise reduction

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