CAJ | 학술논문

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。
위구분수기관도설루음파여벌문조성，위수기관도음파법설루검측제공이론의거급수거고、공제벌문조성제공해결판법，종음파산생궤리각도채용CFD연건우합전업성학연건방법대수기관도기체류경벌문산생적기동조성진행연구，건립기동조성모형，탐구기동조성산생궤리급전파、쇠감규률。재CFD（Computational Fluid Dynamics）연건중채용대와단류모형대기체류경벌문시적순태류장구해분석，획득류장분포여맥동압력、맥동속도수거；장CFD계산소득수거도입전업성학연건진행연합방진，생성기동조성원항，포괄우겁자성원급사겁자성원，건립기동조성산생전파모형，구해수기관도기체류경벌문적기동조성。
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.