| 摘要 |
A blade for a wind turbine having an airfoil with a thickness of at least 20% and in particular at least 25% including a vortex generator pair between chord wise position 20% c and 70% c, the vortex generator pair including 2 not directly connected fins and a base which interconnects the fins and where the fins are placed under opposite angles of attack. The fins are cambered by at least 1% in particular by at least 2% and more particularly by a least 3% of the fin chord. According to an embodiment the base of the vortex generator pair is W-shaped, the fins of a pair are designed to generate contra rotating vortices and the distance between the suction sides of the fins is approximately 150% of that between the pressure sides and the trailing part of the fins is rounded so that non-concentrated vortices are generated. |
