Patent ID: 7234921

Claim:
A method for enhancing effectiveness of rotor blade of wind energy device, characterized in that a rotor blade is made in the form of a wing with a thick aerodynamic profile and a vortex system for control of the boundary layer is arranged on the rear part of the blade opposite the side facing the wind, this system consisting of longitudinal cavities with central bodies forming annular channels, and suction withdrawal of air is carried out from the cavities and central bodies through air vents into receivers, which are connected by air ducts to a low pressure receiver inside the blade, air from which due to centrifugal forces of a rotating blade and also because of the difference in pressure occurring at a blade shank and end of the blade because of the large sum velocity of the air at the end of the rotating blade, is sucked out to the end of the blade through an air duct, wherein plates limiting the air flow flowing off along the blade are mounted inside the cavity and on the outer surface of the blade.