WINDMILL BLADE AND WIND POWER GENERATOR USING SAME.

摘要

Provided are a windmill blade in which the thickness of a turbulent flow boundary layer produced on the surface of the tip end of the blade can be reduced and the noise generated at the rear edge part can be effectively suppressed, and a wind power generator using the windmill blade. The windmill blade (9) has its cross section of an airfoil shape. An elevation angle decreasing part (19) for decreasing the angle of elevation when the blade is rotated at a predetermined rotational speed at least is provided on the blade in a predetermined range from the blade end (20) to the blade root (21).