气体管道泄漏声源产生机理仿真研究

Simulation Research on the Generation of Acoustic Sources of Gas Pipeline Leakage

以Lighthill气动声学方程为基础,采用时域差分方法,对不同泄漏孔直径的管道气体泄漏声场进行了数值模拟。数值模拟结果表明,在泄漏孔处,泄漏孔直径、内压对声强影响成线性关系。模拟结果为管道气体泄漏的声发射检测提供依据。

Based on Lighthill aeroacoustics equations,the numerical simulation of gas pipeline leakage in different leakage diameters was performed using finite - difference time - domain method. The result of numerical simulation shows that there is linear relationship between pressure, pipeline diameters and sound intensity in pipeline leaking hole. And the simulation result can offer the theoretical gist for acoustic emission detection on gas pipe leakage.