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Influence of Cavity Shape on Aerodynamic Noise by a Hybrid LES-FWH Method

The flow mechanism and radiate noise by a low-speed turbulent flow over an open cavity has been investigated computationally. After acquired the flow field data which is obtained by using Large Eddy Simulation, hybrid method that couples numerical flow computations with an implementation of the Ffowcs Williams-Hawkings equation is used to capture the flow induced noise. Different cavity length to depth ratios and configurations are used to investigate the influences of cavity deeps and configuration with an incoming flow of 50m/s. In this article, we also discussed the reduction method of cavity noise.