输气管道气体流经阀门气动噪声产生机理分析  

Analysis on the mechanism of aero-acoustic noise generated by gas flow through valves of natural gas pipelines

作　　者：刘翠伟[1] 李玉星[1] 王武昌[1] 谢祝祝 

机构地区：[1]中国石油大学(华东),山东青岛266555 [2]中国石油集团工程设计有限责任公司北京分公司,北京100085

出　　处：《振动与冲击》2014年第2期152-157,共6页Journal of Vibration and Shock

基　　金：国家自然基金(51074175);国家自然基金(51104175);中央高校基本科研业务费专项资金资助(11CX06075A)

摘　　要：为区分输气管道泄漏音波与阀门噪声,为输气管道音波法泄漏检测提供理论依据及数据库、控制阀门噪声提供解决办法,从音波产生机理角度采用CFD软件耦合专业声学软件方法对输气管道气体流经阀门产生的气动噪声进行研究,建立气动噪声模型,探究气动噪声产生机理及传播、衰减规律。在CFD(Computational Fluid Dynamics)软件中采用大涡湍流模型对气体流经阀门时的瞬态流场求解分析,获得流场分布如脉动压力、脉动速度数据;将CFD计算所得数据导入专业声学软件进行联合仿真,生成气动噪声源项,包括偶极子声源及四极子声源,建立气动噪声产生传播模型,求解输气管道气体流经阀门的气动噪声。In order to distinguish leakage noise and valve noise, a theoretical basis and a database for leak detection and location based on acoustic method were provided and the method to control valve noise was introduced. The aero-noise induced by gas flow through valves in gas pipelines was studied from the view point of sound generation mechanism and an aero-noise model was built from which the rules governing the aero-noise generation, transmission and attenuation were concluded. The transient flow field with fluctuating pressure and fluctuating velocity was obtained with the help of large eddy simulation model by using computational fluid dynamics software when gas flows through valves in gas- pipelines. Then the data were imported into acoustic BEM software SYSNOISE to carry through numerical analysis, to generate noise source terms, including the dipole source and quadrupole source, to build the aero-noise model and finally to solve the aero-acoustics problems.

关 键 词：输气管道 音波法泄漏检测 气动噪声 联合仿真 瞬态流场 等效声源 

分 类 号：TE973[石油与天然气工程—石油机械设备] TE88