Effects of Aerofoil Thickness on Airfoil Aerodynamic Characteristics

Based on the k-w SST turbulence model,two airfoils of different thickness are simulated at Re=3×106,the aerodynamic characteristics of airfoil with different thicknesses at the attack angle of-5°~15° are investigated.The unsteady numerical results show that :the effect of the different aerofoil thickness is obvious to the aerodynamic performance,at a small angle of attack range,the greater thickness leads to the large lift-drag ratio,at large angle of attack,larger thickness can improve the lift-drag ratio,broaden the scope of the angle of attack of the high lift-drag ratio,effectively improve the flow separation characteristics.