Detached-eddy simulation for airfoil stall

Detached-eddy simulation (DES) is applied to three airfoils with different stall types. The method combines the strong points of Reynolds-averaged Navier-Stokes and large eddy simulation approaches. Spalart-Allmaras model is basically used, which reduces to a RANS formulation near a solid surface and to a subgrid model away from the wall. LU-SGS implicit scheme is employed to solve the model in time. Comparing with the experimental data, it is found that stall angle can be reasonably predicted by the present method.