The invention relates to a wind turbine blade comprising one or more turbulence generating strips, where the strips are placed on a surface of the blade. The blade is characterized in that at least one joint area of the turbulence generating strips and the surface of the blade are completely or partially covered by sealing means. The invention further relates to a pitch controlled wind turbine comprising at least two pitch controlled wind turbine blades and pitch controlling means for pitching the blades. The pitch controlled wind turbine is characterized in that the blades comprises one or more turbulence generating strips, wherein at least one joint area of the turbulence generating strips and a surface of the blades are completely or partially covered by sealing means.

A wind turbine blade and a pitch controlled wind turbine

A blade of a wind turbine is presented. This blade is provided with a root section for connecting the blade to the shaft or hub of the turbine. The blade also contains a wind-energy-absorbing profile which is optimized for wind flow. The output of the wind turbine is increased by providing the root section with a member that is designed in such a way that the assembly consisting of said member and the root section can absorb wind energy and will increase the overall efficiency of the wind turbine.

Blade of a wind turbine

The invention relates to a rotor blade for a wind power installation. The inventive rotor blade is subdivided longitudinally in at least two sections that are interlinked to give an integral element and that are designed for different high speed values. The high speed value pertaining to the maximum power coefficient of the section farther away from the base of the rotor blade is higher than the high speed value pertaining to the maximum power coefficient of the section that is closer to the base of the rotor blade.

Rotor blade for a wind power installation

Disclosed is a rotor blade for a wind power station, comprising a profiled member that is provided with a relative thickness which decreases towards the outside from a root to a tip of the blade Said profiled member has a leading edge and a trailing edge as well as a suction side and a pressure side while generating a negative pressure relative to the pressure side on the suction side when being flown against by moved air, said negative pressure resulting in buoyancy The suction side of the rotor blade encompasses a device for optimizing the flow around the profiled member The inventive rotor blade is characterized by the fact that said device is provided with at least one planar element that extends substantially in the direction of flow, protrudes from the suction side, and is arranged in the zone of a transversal flow which runs from the root to the tip of the blade on the suction side of the profiled member The height and length of the planar element are selected such that the element causes said transversal flow to be effectively reduced

Rotor blade for a wind power station

The invention relates to a rotor blade (60) of a wind energy station with an upper side (suction side) and a lower side (pressure side), said rotor blade having along a longitudinal axis between a rotor-blade root and a rotor-blade tip a number of profiled members which are constructed, in cross-section, with a leading edge and a trailing edge (62). For each said profiled member a particular design-based direction of air inflow (31, 32, 33, 34, 35) is predefined and the profiled members are constructed in the external region, oriented towards the rotor-blade tip, with a relative thickness of less than 30 % and in the internal region, oriented towards the rotor-blade root, on profiled members having a relative thickness of more than 30 % on the pressure side, an attached device(51) is provided, having an attached-device inflow surface as well as a start-point of the attached-device inflow surface (52) oriented towards the leading edge and an end-point of the attached-device inflow surface(52) oriented towards the trailing edge (62), whereby the start-point of the attached-device inflow surface (52) is positioned in a region between the leading edge and the trailing edge (62) of the profiled members, so that the tangent to the profiled member in the start-point is in an angular region between +20° and -20°, in particular between +15° and -15°, to the design-based direction of air inflow of the profiled members. In addition to this the invention relates to a procedure for manufacturing a rotor blade (60) for a wind energy station.

Rotor blade of a wind energy unit

The rotor blade (7; 17; 27; 37; 47; 57) for operating according to the passive stall or active stall principle wind power plant (1) having an airfoil profile (at least for a portion of its length 17a; 27a; 37a; 47a; having 57a) and (at the leading edge at least in sections by the presence or insertion of a secondary profile 17b; 27b; 37b; 47b; 57b is added), wherein the secondary section (17b; 27b; 37b; 47b; 57b) for damping vibrations through extending from the blade tip of the rotor blade over a partial region of the airfoil profile in its longitudinal direction and such aerodynamically configured and arranged relative to the airfoil section, that it at least in an angle of attack that begins substantially with the angle of attack, wherein the flow separation (at the trailing edge of the airfoil section 17a; 27a; 37a; 47a; 57a) is used, a (with the angle of attack of the airfoil section 17a; 27a; 37a; 47a; 57a) increasing partial Strom ungsablosung (in the region of the leading edge of the airfoil section 17a; 27a; 37a; 47a; 57a) is generated.

Wind turbine blade profile

Rotorblatt (7; 17; 27; 37; 47; 57) fur eine nach dem Passiv-Stall- oder Aktiv-Stall-Prinzip
arbeitende Windkraftanlage (1), das mindestens fur einen Abschnitt seiner
Lange ein Tragflugelprofil (17a; 27a; 37a; 47a; 57a) aufweist und an der
Profilvorderkante wenigstens abschnittsweise durch An- oder Einfugung eines
Sekundarprofils (17b; 27b; 37b; 47b; 57b) erganzt ist, wobei sich das Sekundarprofil
(17b; 27b; 37b; 47b; 57b) zur Schwingungsdampfung durchgehend von der
Blattspitze des Rotorblattes uber einen Teilbereich des Tragflugelprofils in dessen
Langsrichtung erstreckt und derart aerodynamisch ausgebildet und relativ zum
Tragflugelprofil angeordnet ist, das es wenigstens in einem Anstromwinkelbereich,
der im wesentlichen mit dem Anstromwinkel beginnt, bei dem die Stromungsablosung
an der Profilhinterkante des Tragflugelprofils (17a; 27a; 37a; 47a; 57a)
einsetzt, eine mit dem Anstromwinkel des Tragflugelprofils (17a; 27a; 37a; 47a;
57a) zunehmende partielle Stromungsablosung im Bereich der Profilvorderkante des
Tragflugelprofils (17a; 27a; 37a; 47a; 57a) erzeugt.

Klaus-Peter Jaquemotte

Papers

Wind turbine blade profile

Rotorblatt für eine Windkraftanlage