Wind turbine blade and wind power generator using the same

F - Mech Eng,Light,Heat,Weapons – 03 – D

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F03D 1/06 (2006.01) F03D 11/00 (2006.01)

Patent

CA 2697615

Provided are a wind turbine blade that can reduce the thickness of a turbulent-flow boundary layer generated on the blade surface of a blade tip portion to prevent noise generated at a trailing edge portion effectively, as well as a wind power generator using the same. Provided is a wind turbine blade, which is a wind turbine blade (9) having an airfoil shape in cross section, wherein an angle-of-attack decreasing portion (19) that decreases an angle of attack during rotation at at least a predetermined rotational speed is provided over a predetermined range from a blade tip (20) to a blade root (21) side.

L'invention concerne une aube d'éolienne, dont l'épaisseur d'une couche limite d'écoulement turbulent produite sur la surface de l'extrémité de pointe de l'aube peut être réduite et le bruit généré au bord arrière peut être efficacement supprimé, et un aérogénérateur utilisant l'aube d'éolienne. L'aube d'éolienne (9) a une section transversale de forme aérodynamique. Une partie réduisant l'angle d'élévation (19) pour réduire l'angle d'élévation quand l'aube tourne à une vitesse de rotation prédéterminée est au moins prévue sur l'aube, dans une gamme prédéterminée, entre l'extrémité de l'aube (20) et la racine de l'aube (21).

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