Vehicle wind noise prediction through solutions of Navier-Stokes and Ffowcs Williams Hawkings equations

The aim of this study is to calculate flow noise of a car model at a far field location. Aeroacoustic calculations for non-reduced models require excessive computing source. Ffowcs Williams and Hawkings (FWH) method is one of the most effective methods of Computational Aero Acoustics (CAA) in terms of computational cost. The FWH method is a hybrid method, which consists of a near field flow solution and then a linear acoustic propagation to far field. Acoustic sources around the vehicle must be captured accurately. A detailed, unsteady turbulent flow simulation is required due to the nature of noise generation mechanisms. The sound generated by such sources is propagated to far field using FWH integral equations that are implemented in a FORTRAN code. The results are compared with a wind tunnel test