F - Mech Eng,Light,Heat,Weapons – 03 – D
Patent
F - Mech Eng,Light,Heat,Weapons
03
D
F03D 1/06 (2006.01) F01D 5/14 (2006.01)
Patent
CA 2725960
The invention concerns a rotor blade (6).and a wind turbine (1) with such a rotor blade (6), wherein the absolute length L of the rotor blade (6) extends from the blade attachment (11) to the blade tip (12) and the relative blade length x/L proceeds from the blade attachment (11). The rotor blade (6) is divided into an inner longitudinal section L; associated with the blade attachment (11) and an outer longitudinal section L a associated with the blade tip (12), wherein the transition from the inner longitudinal section L i to the outer longitudinal section L a defines the cross-sectional plane E o, and the blade tip (12) defines the cross-sectional plane E E. As a function of the relative blade length x/L, the rotor blade (6) has a specific aerodynamic profile with a chord t, a twist .theta., a relative thickness d/t, a relative curvature f/t, and a relative trailing edge thickness h/t. In order to reduce acoustic emissions without having to accept appreciable losses in performance, it is proposed according to the invention that the cross-sectional plane E o is located at a relative blade length x/L in the range between 0.80 and 0.98, the blade chord t of the aerodynamic profile in the cross- sectional plane E E is at least 60% of the blade chord t of the aerodynamic profile in the cross-sectional plane E o, and the blade twist .theta. of the aerodynamic profile in the cross- sectional plane E E is greater than the blade twist .theta. of the aerodynamic profile in the cross-sectional plane E o.
Keller Walter
Mickeler Siegfried
Fetherstonhaugh & Co.
Keller Walter
Mickeler Siegfried
LandOfFree
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