系统仿真学报 ›› 2018, Vol. 30 ›› Issue (4): 1615-1621.doi: 10.16182/j.issn1004731x.joss.201804050

• 短文 • 上一篇    

笼套式节流阀气动噪声机理研究

李悦钦1, 肖飞1, 范铭2, 徐小东1   

  1. 1. 西南石油大学 机电工程学院,四川 成都 610500;
    2. 中国石油西南油气天分公司,四川 成都610051
  • 收稿日期:2016-05-10 修回日期:2016-07-01 出版日期:2018-04-08 发布日期:2019-01-04
  • 作者简介:李悦钦(1956-),男,四川成都,硕士,副教授,研究方向为流体机械、空气动力性噪声;肖飞(1992-),男,四川资阳,硕士生,研究方向为流体机械;范铭(1986-),男,四川遂宁,本科,高工,研究方向为井下工具。

Aerodynamic Noise Generating Mechanism of Corbula Type Throttle Valves

Li Yueqin1, Xiao Fei1, Fan Ming2, Xu Xiaodong1   

  1. 1. Southwest petroleum university institute of electrical and mechanical engineering, Chengdu 610500, China;
    2. Southwest Oil and Gas Branch of PCL, Chengdu 610051, China
  • Received:2016-05-10 Revised:2016-07-01 Online:2018-04-08 Published:2019-01-04

摘要: 针对气体流经笼套式节流阀所引起的气动噪声问题,采用CFD软件与声学软件联合仿真的方法,研究了笼套式节流阀气动噪声的产生机理和噪声频谱特性。研究结果表明:流经节流阀的气体遭遇小孔缩流断面的节流作用,在小孔出口处速度剧烈增加形成超音速欠膨胀射流,引发剧烈的速度、压力脉动,形成了强烈的湍流噪声和激波噪声,小孔节流结构是阀门流噪声产生的根本原因;阀门内部流噪声的频谱呈现宽频带特性,且气动噪声低频部分能量较大,沿工作介质流动方向高频噪声幅值迅速下降,主要噪声的频带向低频带移动。

关键词: 联合仿真, 节流阀, 气动噪声, 激波

Abstract: The throttle mechanism of pneumatic noise and the noise spectrum characteristics of corbula type throttle valve are studied by targeting on aerodynamic noise problems caused by gas when flowing through the corbula type throttle valve, the method of CFD software with acoustic software simulationis used as well. The studies have showed that when the flow of fluid flows through shrink section, it can be effected by throttling effect, the speed of gas on the hole exit increases rapidly to form under-expanded supersonic jet, causing strong turbulence and shock wave noise. The conclusionis that the construction of throttling gas by small holes is the root cause for fluid noise in the valve. The flow noise within valve is characterized by spectrum of wideband; the aerodynamic noise with low frequency possesses higher energy; the noise amplitude of high frequency drops quickly along the flowing direction of working medium; and the main noise band moves to the low frequency band.

Key words: joint simulation, throttle valve, aerodynamic noise, shock wave

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