A wind turbine blade (1) provided with a leading edge (2) and a trailing edge (3), wherein the trailing edge (3) is sharper than the leading edge (2) and wherein a pressure side surface (4) and a suction side surface (5) of the wind turbine blade (1) meet each other at the trailing edge (3), wherein the trailing edge (3) is non-truncated, and a flow-permeable add-on (6) is attached to the pressure side surface (4) and to the suction side surface (5) of the trailing edge (3), which add-on (6) is provided with through-holes (7) that connect opposite sides of the add-on (6) on the pressure side (8) and the suction side (9) respectively, and that when looking from the pressure side (8) towards the suction side (9), at least one of said through-holes (7) is provided with an increasing dimension of the open area provided by said through-hole (7) such that the open area at the suction side (9) is larger than the open area at the pressure side (8).

A kinetic fluid energy conversion system comprises one or more hubs which rotate about a central hub carrier, each including one or more independently controlled articulating energy conversion plates (“ECP”). An articulation control system rotates each ECP independently of all others to control its orientation with respect to the fluid flow direction between an orientation of 90° perpendicular to the fluid flow, while traveling in the direction of the flow and 0° minimal drag parallel position to the flow, while traveling in the direction against the flow or blocked from it. Each hub can be operably coupled to another hub to form one or more counter-rotating hub and ECP assemblies whereby the mechanical energy is transferred through the hubs, to one or more clutch/gearbox/generator/pump assemblies thereby permitting such assemblies to be land-based when the system is air-powered, and above or near the surface, when the system is water-powered.

The present disclosure relates to a device and a method for swinging power generation and vibration suppression by using arc-shaped wing plates with rough surfaces. The device consists of two parts, namely, a rotary swinging system and a collector system. The rotary swinging system includes a collector riser, steering bearings, nanometer material arc-shaped power generation wing plates, and flexible tail plates. The collector system includes telescopic power generation cylinders, a waterproof electric slip ring, and a waterproof power transmission line. The suppression of energy-consumption-free vortex-induced vibration is realized under the combined action that the nanometer material arc-shaped power generation wing plates divide a flowing space and adjust a flow direction, the nanometer material arc-shaped power generation wing plates drive the flexible tail plates to swing to destroy a tail vortex street, and hemispherical bulges and trumpet-shaped deflector holes disturb a boundary layer around flow.

The present disclosure relates to a device and a method for swinging power generation and vibration suppression by using arc-shaped wing plates with rough surfaces. The device consists of two parts, namely, a rotary swinging system and a collector system. The rotary swinging system includes a collector riser, steering bearings, nanometer material arc-shaped power generation wing plates, and flexible tail plates. The collector system includes telescopic power generation cylinders, a waterproof electric slip ring, and a waterproof power transmission line. The suppression of energy-consumption-free vortex-induced vibration is realized under the combined action that the nanometer material arc-shaped power generation wing plates divide a flowing space and adjust a flow direction, the nanometer material arc-shaped power generation wing plates drive the flexible tail plates to swing to destroy a tail vortex street, and hemispherical bulges and trumpet-shaped deflector holes disturb a boundary layer around flow.

The present disclosure relates to a wind power installation having an aerodynamic rotor with at least one rotor blade, wherein the rotor blade has an active flow control device, which is designed to actively influence a flow over the rotor blade, wherein the flow control device comprises an opening in a rotor blade surface, referred to as a rotor blade surface opening, wherein the flow control device is configured to draw off and/or blow out air through the rotor blade surface opening air by way of a controllable air flow, wherein the wind power installation has a controller which is configured to control an amount of the controllable air flow through the rotor blade surface opening according to at least one of the following rules: if a rotational speed threshold value of a rotational speed of the rotor is exceeded, increasing the maximum controllable air flow successively with increasing rotational speed, if a torque threshold value of a torque of the rotor is exceeded, increasing the maximum controllable air flow successively with increasing torque.

A wind turbine blade comprising a vortex generator including a plurality of fins. The plurality of fins include a first fin positioned closest to a blade tip, and the first fin is disposed closer to a blade root than a position closer to the blade tip, of a blade spanwise directional position at which a ratio t/C of a blade thickness t to a chord length C is 0.4 or a radial directional position of 0.2R with respect to a radius R of a rotor including the wind turbine blade. The vortex generator may include at least one fin disposed in a mounting range of zero to 0.1 R, such that a ratio x/C of a chordwise directional position x of the at least one fin to the chord length C satisfies 0x/C0.2.

A kinetic fluid energy conversion system comprises one or more hubs which rotate about a central hub carrier, each including one or more independently controlled articulating energy conversion plates (ECP). An articulation control system rotates each ECP independently of all others to control its orientation with respect to the fluid flow direction between an orientation of 90 perpendicular to the fluid flow, while traveling in the direction of the flow and 0 minimal drag parallel position to the flow, while traveling in the direction against the flow or blocked from it. Each hub can be operably coupled to another hub to form one or more counter-rotating hub and ECP assemblies whereby the mechanical energy is transferred through the hubs, to one or more clutch/gearbox/generator/pump assemblies thereby permitting such assemblies to be land-based when the system is air-powered, and above or near the surface, when the system is water-powered.

An aerodynamic device is described for mounting to an outer surface of a wind turbine blade. The aerodynamic device includes a baseplate having an inner surface defining a mounting region and a sealing region at least partially surrounds the mounting region. The mounting region is bonded to the outer surface of the blade by an adhesive. A seal is provided between the sealing region of the baseplate and the outer surface of the blade. The seal at least partially surrounds the mounting region. A barrier is provided between the seal and the adhesive. The barrier is arranged substantially to prevent contact between the seal and the adhesive.

A kinetic fluid energy conversion system comprises one or more hubs which rotate about a central hub carrier, each including one or more independently controlled articulating energy conversion plates (ECP). An articulation control system rotates each ECP independently of all others to control its orientation with respect to the fluid flow direction between an orientation of 90 perpendicular to the fluid flow, while traveling in the direction of the flow and 0 minimal drag parallel position to the flow, while traveling in the direction against the flow or blocked from it. Each hub can be operably coupled to another hub to form one or more counter-rotating hub and ECP assemblies whereby the mechanical energy is transferred through the hubs, to one or more clutch/gearbox/generator/pump assemblies thereby permitting such assemblies to be land-based when the system is air-powered, and above or near the surface, when the system is water-powered.

Rotor blade assemblies for wind turbines are provided. A rotor blade assembly includes a rotor blade. In some embodiments, the rotor blade assembly further includes a surface feature configured on an exterior surface of the rotor blade, the surface feature having an exterior mounting surface. At least a portion of the exterior mounting surface has a contour in an uninstalled state that is different from a curvature of the exterior surface of the rotor blade at a mount location of the surface feature on the rotor blade. In other embodiments, the rotor blade assembly further includes a seal member surrounding at least a portion of a perimeter of the surface feature. The seal member contacts and provides a transition between the exterior surface and the surface feature.