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声学风洞流场和试验环境会影响声音的传播,进而会影响声源识别。根据用于静态声源识别的经典Beamforming算法,利用声波在气流场和风洞射流剪切层中的传播规律,给出了一种能够用于声学风洞试验的基于麦克风阵列的气动噪声源识别分析方法,并进行了数值仿真和数值验算。数值验算结果表明风洞流场和剪切层对噪声源识别效果影响明显,采用本文所总结的计算方法能有效地修正这些影响。
Acoustic wind tunnel flow field and test environment will affect the sound transmission, which will affect the sound source identification. According to the classical Beamforming algorithm for static sound source recognition, a microphone array-based aerodynamic noise source for acoustic wind tunnel testing is presented based on the propagation of acoustic waves in the airflow field and in the wind tunnel jet shear layer Analytical method, and carried out numerical simulation and numerical verification. Numerical results show that the wind tunnel flow field and the shear layer have a significant effect on noise source identification, and these effects can be effectively corrected by using the calculation method summarized in this paper.