Airfoil trailing⁃edge noise prediction based on CFD / CAA coupled boundary method

被引：1
|
作者：
Lu R. [1 ]
Ding Y. [2 ]
Yu P. [3 ]
Tan K. [2 ]
Pan G. [1 ]
机构：
[1] School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an
[2] Xi′an Precision Machinery Researh Institute, Xi′an
[3] School of Aeronautics, Northwestern Polytechnical University, Xi′an
来源：
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | 2023年 / 41卷 / 02期
关键词：
acoustic perturbation equations; flow⁃induced noise; large eddy simulation; sound wave boundary condition; trailing edge noise;
D O I：
10.1051/jnwpu/20234120319
中图分类号：
学科分类号：
摘要：
Flow⁃induced noise hybrid prediction method based on sound wave boundary condition is an effective numerical method to deal with a flow⁃induced noise problems of complex configuration. This method can not only finely simulate the sound source, but also analyze the noise propagation characteristics. In this paper, numerical methods such as space⁃time discrete scheme and boundary conditions involved in discrete solution of acoustic perturbation equations(APE) are developed, and strategies such as adding buffer layer are proposed to improve divergence caused by numerical discontinuity at the junction of sound source region and propagation region, so as to establish a high⁃precision flow⁃induced noise hybrid method. In order to study the rationality of flow⁃induced noise hybrid method, the numerical simulation of acoustic radiation at the trailing edge of NACA0012 airfoil in BANC experiment was carried out. Compared with the results of sound field solved by large eddy simulation method, the analysis shows that the high⁃precision flow⁃induced noise hybrid method based on sound wave boundary conditions can predict the spatial sound field distribution with high precision and directly reflect the interaction between sound waves. Compared with the results of large eddy simulation, the error of sound pressure level is less than 2 dB, and the noise directional distribution trend is consistent. ©2023 Journal of Northwestern Polytechnical University.
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页码：319 / 328
页数：9
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