Patent ID: 7931444
Filing Date: 2011-04-26
Classification: F03D,F05B,Y02E,Y10S

Abstract:
1. A wind turbine comprising a rotor with wind turbine blades each having a root end connected to a hub of the wind turbine and a tip end, the tip end of each of which being equipped with a winglet extending a distance in a direction perpendicularly to a longitudinal direction of the blade, wherein a combined radius specific solidity of the rotor at the tip end of the blades immediately adjacent the winglet is 0.085 times an extension of the winglet divided by a radius of the rotor plus a value within the range of 0.0012 and 0.0048, plus, the combined radius specific solidity of the rotor being defined as n being a number of blades in the rotor, C