| 摘要 |
The invention relates to a rotor blade for a wind power plant, which has an aerodynamic profile comprising a rotor blade leading edge and a rotor blade trailing edge. The invention also relates to a rotor blade tip for a rotor blade having an aerodynamic profile with a pressure and a suction side, said rotor blade tip being bent or offset in its end section in the direction of the pressure side of the rotor blade. The aim of the invention is to further reduce noise emission of wind power plants. For this purpose, the rotor blade, in its end section, is bent or offset in the rotor blade plane in the direction of the trailing edge of the rotor blade. The invention is based on the finding that in a rotor blade whose tip is not pointed the effective rotor blade surface remains unchanged exactly in the exterior section where it is most efficient. By bending or offsetting the end section of the rotor blade, the trailing edge in the end section of the rotor blade is displaced backwards so that the current on the rotor blade trailing edge tears off in the outer section with a delay. Alternatively, the rotor blade tip can be embodied in such a manner that the exterior section is pointed. This embodiment of the rotor blade tip is based on the finding that the reduced blade depth results in a reduced air current around the blade tip since its energy is distributed across the trailing edge vortices while the effective rotor blade surface is reduced at the same time. By offsetting the rotor blade tip the effective rotor blade depth remains optimal up to the offset rotor blade tip. |
