Blade for a rotor of a wind or water turbine

Details Blade for a rotor of a wind or water turbine Blade for a rotor of a wind or water turbine

F - Mech Eng,Light,Heat,Weapons

03

B

F03B 3/12 (2006.01) F03D 1/06 (2006.01)

Patent

CA 2726006

The present invention relates to a blade for a rotor of a wind turbine, which rotor comprises a hub, from which hub at least one blade extends substantially radially, which blade comprises a root area closest to the hub, which blade comprises a transition area away from the hub, which blade further comprises at least a first airfoil. The scope of the invention can be fulfilled by blades comprising at least one longitudinal channel, which channel has an inlet opening in the front of the airfoil, which channel has an outlet opening at the backside of the air foil, which channel opening area is decreasing from the inlet opening to the outlet opening. Hereby, it is achieved that in the channel there is an increasing speed of the air which is flowing through that channel which will lead to increasing the power produced from the wind surrounding the blade.

La présente invention porte sur une pale pour un rotor d'éolienne, lequel rotor comprend un moyeu, à partir duquel moyeu s'étend sensiblement radialement au moins une pale, laquelle pale comprend une zone d'emplanture la plus proche du moyeu, laquelle pale comprend une zone de transition éloignée du moyeu, laquelle pale comprend en outre au moins un premier profil aérodynamique. L'objectif de l'invention peut être atteint par des pales comprenant au moins un canal longitudinal, lequel canal présente une ouverture d'entrée à l'avant du profil aérodynamique et une ouverture de sortie à l'arrière du profil aérodynamique, laquelle surface d'ouverture de canal diminue de l'ouverture d'entrée à l'ouverture de sortie. On obtient ainsi, dans le canal, une vitesse croissante de l'air qui s'écoule à travers ce canal, ce qui conduit à une augmentation de la puissance produite à partir du vent venant frapper la pale.

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