低马赫数流动噪声的计算预测分析

摘要

The factors of predicting low Mach number flow noise are hackled. The numerical computations of sound from flow around a bluff body are conducted by using large-eddy simulation (LES) coupling with Ffowcs Williams-Hawkings (FW-H) integral method. And the sound source characteristics are analyzed by using the Lilley equation with a source term. The results show that calculated values agree well with the measured values.%　　梳理了低马赫数流动噪声计算预测的因素，采用不可压缩流体流动的大涡模拟与Ffowcs Williams-Hawkings（FW-H）积分方法耦合对某非流线体绕流发声进行了数值计算与校验，并采用Lilley方程源项对声源特征进行了分析。结果表明，计算值与实测值相吻合。