Design of Airfoil for Large Thickness of MW Grade Wind Turbine and Wind Tunnel Test Study

摘要

This paper describes CARDC22 with large thickness, high Reynolds number and high lift drag ratio of airfoil, which fits rotor blade of MW grade for wind turbine. The theoretical calculation and wind tunnel test are made to get the aerodynamic performance based on different Reynolds numbers and stalling characteristic with large angle of attack. The test result basically accords with the theoretical calculation result. The research results shows that: The maximum lift drag ratio Cymax=1.6066,when αis 16°,and Kmax＝134, when αis 8°.The result indicates CARDC22 airfoil designed by CARDC absolutely fits the requirements of MW grade wind turbine, also with complete competition capability to national products of the same type.