Abstract:

The low mach number turbulent flow past two kinds of airfoils, a airfoil and GAW 1 airfoil, at the attack angle of near stall condition is numerically simulated with SIMPLE algorithm and three turbulence models including the standard K ε two equation turbulence model (SKE), a nonlinear K ε two equation turbulence model (NKE), and a modified K ε two equation turbulence model (MKE). The results show that both the NKE and the SKE successfully simulate the separated flow pattern on the airfoil surface, and accurately predict the location of separation and the aerodynamic force coefficients. Therefore, these two models are of engineering value in the design of the airfoil and the wing.

Key words: turbulent flow, air foil, t wo-equat ion tur bulence model