Numerical simulation of noise generated by shock (wave) and boundary layer interaction in aero-engine inlet飞机进气道中激波边界层干扰引起噪音的数值模拟

被引：0
作者：
Yuanjun Dai
Yiran An
Zhi Li
Qunfeng Zhang
机构：
[1] Peking University,Department of Mechanics and Engineering Science, College of Engineering
[2] Beijing Jiaotong University,School of Civil Engineering
来源：
Acta Mechanica Sinica | 2022年 / 38卷
关键词：
Noise; SBLI; NLAS; FW-H equation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We utilize the nonlinear acoustic solver (NLAS) and Ffowcs-Williams/Hawkings (FW-H) equation to investigate the noise generation and radiation due to shock (wave) and boundary layer interaction (SBLI) in the inlet duct. A classical benchmark for SBLI is chosen to validate the flow features and numerical results show good agreement with experimental results. In the simulation of the noise generated by SBLI, the inlet buzz phenomenon is successfully observed. The oscillation of the normal shock is a kind of little buzz and the oscillation of inner shocks is a kind of big buzz with a frequency around 100 Hz. In the far-field, frequency spectrums show a dominant frequency close to the frequency of inner shocks oscillation. This indicates that the oscillation of inner shocks determines the magnitude of the overall sound pressure level (OASPL) of the far-field noise.
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