Repower Systems Ag

Senvion Se

Marc Petsche

Urs Bendel

Peter Quell

Bert Gollnick

Matthias Korjahn

The profile (-) of a rotor blade () of a wind power plant is characterized in that the main camber line runs beneath the chord at least in sections in the direction of the pressure side (). The profile is further characterized in that the profile (-) has a relative profile thickness of greater than 45% with a position of maximum thickness of less than 50%, wherein a lift coefficient (c) of greater than 0.9, particularly greater than 1.4 is achieved in turbulent flow.

Profile of a rotor blade and rotor blade of a wind power plant

The invention relates to a rotor blade () of a wind energy plant with a top side (suction side) and a bottom side (pressure side) wherein profiles () with a front edge and a back edge () in cross-section are designed along a longitudinal axis between a rotor blade root and a rotor blade tip, one designed-based direction of air inflow () is predetermined for each profile () and the profiles () in the outer area facing the rotor blade tip are designed with a relative thickness of less than 30%. The rotor blade () is characterized in that an attached device (), which has an attached-device inflow surface as well as a start point () facing the front edge of the attached-device inflow surface () and an end point facing the back edge () of the attached-device inflow surface (), is arranged along the longitudinal axis in the inner area dedicated to the rotor blade root to profiles () with a relative thickness of more than 30% on the pressure side.

Rotor blade of a wind energy unit

A rotor blade for a wind power station includes a profiled member that is provided with a relative thickness which decreases towards the outside from a root to a tip of the blade. The 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, the negative pressure resulting in buoyancy. The suction side of the rotor blade encompasses a device for optimizing flow around the profiled member. The 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.

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Nubbel, Germany

Marc Petsche