Investigation of dynamic stall of wind turbine airfoil

Dynamic stall of NACA0012 airfoil and S809 airfoil at low Reynolds number were numerically investigated. The effect ofdifferent grids and different turbulence models on numerical predictions of the lift, drag and pitching moment coefficients was studied. The results accord with the experimental data prefreably and confirms that numerical simulation method is effective. The same method was applied to dynamic stall of BH-W airfoil developed by Beihang University. It is found that the lift coefficient decrease steadily and the pitching moment coefficients do not change significantly in the process of dynamic stall. The BH-W airfoil can be applied to blades of large-scale wind turbine.