宽频阵风/固壁翼型干涉噪声数值模拟

Rotor and stator interaction noise usually covers a broadband frequency range. The numerical method for single frequency gust/airfoil interaction noise can only give one result in each computation, therefore it needs sevral times to cover all the frequencies. A broadband method is proposed for the simulation of gust/airfoil interaction noise. The two dimension linearized Euler equations are solved by a computational aeroacoustics approach. Acoustic sccatering method is used to approve interaction. Numerical examples for gust/airfoil interactions are presented for the validation of the proposed broadband methods through the comparison with single frequency results. It is shown that the broadband results agree very well with the single frequency results at different frequencies. This demonstrates the feasibility, accuracy and efficiency of the broadband numerical methods.