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

A high-parameter pressure reducing valve, noise source location technology, applied in the direction of the system to determine the direction or offset, direction finder using ultrasonic/sonic/infrasonic, beacon system using ultrasonic/sonic/infrasonic, etc., can solve Intense turbulence, high noise, etc., to achieve high computing efficiency, cost savings, and high accuracy

Inactive Publication Date: 2016-04-13
ZHEJIANG UNIV
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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 ...

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

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Embodiment Construction

[0031] refer to Figure 1 to Figure 5 , the present invention comprises the following steps:

[0032] (1) Establish a high-parameter compressible flow numerical model of a pressure reducing valve using fluid mechanics software;

[0033] (2) Solve the flow field distribution of the high-parameter pressure reducing valve without orifice plate and the high-parameter pressure reducing valve with orifice plate respectively through the basic control equation or the large eddy simulation turbulence model equation;

[0034] (3) Through the calculation of the steady-state flow field, analyze the flow field distribution of the two models respectively, and compare and analyze the turbulence intensity and the change trend of the Mach number along the streamline of the two models, and obtain the distribution diagram of the sound power level on the symmetrical surface of the two models;

[0035] (4) Steady-state analysis is carried out to locate the noise source positions of the two models...

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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...

Claims

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Application Information

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IPC IPC(8): G01S1/76G01S3/802
CPCG01S1/76G01S3/802
Inventor 金志江陈富强钱锦远沈小丽刘步展
Owner ZHEJIANG UNIV
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