科研之友
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摘要
An aeroacoustic integral computational method based on a tailored Green's function is presented to study aerodynamic noise produced by complex-shaped configurations in half-space, with the help of the half-space wave equation for point source and Lighthill's acoustic analogy. The emphasis is on calculating the scattered noise with a tailored Green's function and on discussing the impact of the scattering effect. The aerodynamic noises from a circular cylinder and a NACA 0012 airfoil in half-space are studied and compared with that in free space, and the influence of the scattering effect on the noise field is investigated. Numerical results illustrate similar characteristics in compressible fluid calculation and acoustic calculation, and thus the aeroacoustic integral method in half-space can accurately predict the scattered noise induced by complex-shaped configurations. This method simplifies the calculation of scattering sources and improves the computational efficiency of aerodynamic noise in physical space including the ground effect.
- 出版日期2015-2
- 单位西北工业大学
