Blade for a wind turbine rotor

摘要

Provided is a blade for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub, from which the blade extends substantially radially when mounted, said blade having a chord plane extending between a leading edge and a trailing edge of said blade, a root area closest to the hub, an airfoil area furthest away from the hub, a transition area between the root area and the airfoil area, a first airfoil extending substantially along the entire airfoil area, and a second airfoil separately mounted to the blade, said second airfoil arranged at a mutual distance transverse to the chord plane and extending along the root area of the blades.

主权项

1. A blade (1) for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub from which the blade (1) extends substantially radially when mounted, said blade (1) comprising:
a chord plane (K) extending between the leading edge (5) and the trailing edge (6) of said blade; a root area (2) closest to the hub, an airfoil area (4) furthest away from the hub and a transition area (3) between the root area (2) and the airfoil area (4); a single airfoil substantially along the entire airfoil area (4); at least a first root segment (7) and a second root segment (8) along substantially the entire root area (2), the segments being arranged with a mutual spacing transverse to the chord plane (K), wherein at least one of the root segments (7, 8) has an airfoil profile, and wherein a total length of the root area and the transition area is between 5% and 35% of a total length of the blade.