A fluid flow turbine blade assembly for a turbine rotor includes a blade and a deflector extending spanwise along at least a portion of the blade. At least a portion of an upstream surface of the deflector, along at least a portion of a span of the deflector, has a concave shape in a chordwise direction such that at least a portion of a chord line between leading and trailing edges of the deflector is disposed outside a profile defined between the upstream surface and a downstream surface of the deflector. The deflector has a substantially uniform thickness or a chord-wise varying thickness between the upstream surface and the downstream surface. The deflector alters fluid flow over the blade so as to increase the blade's contribution to global torque generated by the assembly so that, with the deflector's torque contribution, the global torque of the assembly is greater than the global torque that would be generated by the blade alone without the benefit of the deflector.

The invention describes a wind turbine rotor blade active flap (1) comprising a primary body (1P) adapted for mounting to the trailing edge (20.sub.TE) of a wind turbine rotor blade (20); a flap turning means (10, 11, 12) adapted to turn the active flap (1) between a neutral position (R.sub.0), in which the active flap (1) directs airflow (A.sub.20S, A.sub.20P) towards the suction side (P.sub.20S) of the rotor blade (20), and a working position (R-R.sub.max), in which the active flap (1) directs airflow (A.sub.20S, A.sub.20P) towards the pressure side (P.sub.20P) of the rotor blade (20); and a secondary body (1S) mounted to the primary body (1P) and configured to hold the active flap (1) in its neutral position (R.sub.0). The invention further describes a wind turbine (2) comprising a number of rotor blades (20) mounted to a hub; and an active flap (1) according to the invention, mounted to the trailing edge (20.sub.TE) of each rotor blade (20).

A system and method for manufacturing a wind turbine blade. The wind turbine blade includes a shell structure defining a leading edge and a trailing edge. The wind turbine blade also includes a longitudinal edge extension arranged to extend at least partially along the leading edge or at least partially along the trailing edge to modify an aerodynamic characteristic of the wind turbine blade. The longitudinal edge extension includes a center section and a peripheral section comprising attachment means, and the shell structure is arranged to engage with the attachment means to secure the longitudinal edge extension.

The performance of airfoils on wind turbines has been found to be improved by the presence of endplates mounted to the airfoil. Using steady numerical simulations, the shape of the endplates that improves the lift coefficients and lift-to-drag coefficients to the greatest degree is a thin plate that follows the chord of the airfoil with a thickness that is between an eighth and a quarter of the length of the airfoil. Rounding the edges of the endplates further enhance the performance of the airfoil, and the overall effect of the endplates achieves nearly a 9.1% increase and 30% decrease in the lift and drag forces, respectively.

The present invention relates to a wind turbine blade comprising an aerodynamic shell having an outer surface forming at least part of an exterior surface of the wind turbine blade and an inner surface. An access window extends through the shell. A panel is arranged within a recessed portion at the inner surface of the shell adjacent to the access window for closing the access window.

A rotor blade of a wind turbine includes a first rotor blade segment having a first shell portion, a second rotor blade segment having a second shell portion and a joint connecting the first rotor blade segment with the second rotor blade segment between the first shell portion and the second shell portion, whereby the rotor blade further includes a fairing, the fairing covering the joint and being attached to the first shell portion and the second shell portion by means of an adhesive. Further provided is a wind turbine having this rotor blade.

A wind turbine blade includes a plurality of add-on elements, which are arranged on an outer surface of the blade, wherein the plurality of add-on elements includes at least one flexible add-on element and at least one stiff add-on element of the same add-on element type, wherein the flexible add-on element is made at least predominantly of an elastic material and the stiff add-on element are made at least predominantly of a stiff material, which is stiffer than the elastic material, wherein the flexible add-on element and the stiff add-on element are arranged offset in span-wise direction and/or in chord-wise direction of the blade.

An airfoil includes a first end opposite a second end in a spanwise direction. A leading edge extends in the spanwise direction from the first end to the second end and a trailing edge extends in the spanwise direction from the first end to the second end and aft of the leading edge in a chordwise direction. A suction surface extends from the leading edge to the trailing edge and a pressure surface extends from the leading edge to the trailing edge. The airfoil further includes at least one channel with an inlet on a surface of the leading edge and an outlet aft of the leading edge.

A wind turbine rotor blade (10) is provided with a lightning protection device (84) and a leading edge member (70), the leading edge member (70) comprising an erosion shield (78, 80), deicing means, and an electrically conductive outer surface (80) which is operatively connected to the lightning protection device (84). The invention also relates to the use of the leading edge member (70) for providing leading edge erosion protection, ice mitigation and lightning protection of a wind turbine rotor blade.

Provided is a method of manufacturing at least a portion of rotor blade for a wind turbine, the method including: casting at least a portion of an rotor blade outer surface using a casting material thereby at least partially embedding at least one fluid convey tube into the casting material, the fluid convey tube being provided for conveying fluid into or out of a deformable container for adjusting an adjustable flow regulating device of the rotor blade.