06899523 is referenced by 4 patents and cites 11 patents.

The invention concerns a rotor blade for a wind power installation. The degree of efficiency of rotor blades is determined by the afflux angle, that is to say the angle between the rotor blade profile chord and the afflux direction of the air. Particularly in the case of wind power installations the afflux angle depends on the rotor blade speed—that is to say the speed of rotation of the rotor—and the wind direction: the afflux direction is distinguished by the sum vector of the wind speed vWind and the speed of the rotor blade tip vTip, the effective afflux speed veff, see FIG. 1, veff=√{square root over (Wind2)}+vTip2  (1) The object of the invention is therefore that of reducing the sensitivity of a rotor blade to turbulent wind flows. A rotor blade for a wind power installation which is divided in its longitudinal direction into at least two portions which are integrally connected together and which are designed for different high-speed indexes, wherein the high-speed index, associated with the maximum power coefficient, of the portion which is further away from the rotor blade root is greater than the high-speed index, associated with the maximum power coefficient, of the portion respectively disposed closer to the rotor blade root.

Title
Rotor blade for a wind power installation
Application Number
10/168934
Publication Number
6899523 (B2)
Application Date
December 19, 2000
Publication Date
May 31, 2005
Inventor
Aloys Wobben
Aurich, D-26607
DE
Agent
Seed IP Law Group PLLC
IPC
F03D 001/02
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