Wind turbine blade, wind turbine generator equipped with wind turbine blade and method of designing wind turbine blade

Abstract

It is intended to provide a wind turbine blade with superior aerodynamic characteristics and rigidity, a wind turbine generator equipped with the wind turbine blade, and a method of designing the wind turbine blade. The wind turbine blade 1 is provided with a blade tip part 2, a blade root part 4 connected to a hub 112, and an airfoil part 6 disposed between the blade tip part 2 and the blade root part 4. The airfoil part 6 includes a flatback airfoil 10 with a blunt trailing edge 8 at least in an area in a longitudinal direction of the wind turbine blade 1 where a blade thickness ratio X is 40% to 50%. X indicates a ratio of a maximum thickness tMAX to a chord length LC. In the area where the blade thickness ratio X is 40% to 50%, the flatback airfoil has a trailing edge thickness ratio Y which is 5% to YH%, Y indicating a ratio of a trailing edge thickness tTE to the maximum thickness tMAX and YH has a relationship of YH=1.5X−30 with the blade thickness ratio X.

Dependencies are inferred from the claim text.