Numerical Investigation of the Aeroacoustic Behaviours Around an Airfoil by LES, DES and RANS Aproachs

One of the challenging tasks in every computational fluid dynamic simulation, specifically those dealing with turbulent boundary layer and its subsequent phenomenon, is finding the suitable simulation method or turbulence model. In fact, finding the right method can save considerable amount of computational cost for the researchers. In this paper, aerodynamic and aeroacoustic characteristics of flow over NACA0012 airfoil have been investigated using three different turbulence models. These models include RANS, LES and DES. Experimental results are available for chosen flow condition and will be used for validation in every model considered. The results indicate that using RANS and DES aproachs can well predict the pressure coefficient and aerodynamic forces on the cross-section by grids having Y+