AEROACOUSTIC ROTOR BLADE FOR A WIND TURBINE, AND WIND TURBINE EQUIPPED THEREWITH

摘要

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 Li associated with the blade attachment (11) and an outer longitudinal section La associated with the blade tip (12), wherein the transition from the inner longitudinal section Li to the outer longitudinal section La defines the cross-sectional plane E0, and the blade tip (12) defines the cross-sectional plane EE. 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 Θ, 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 E0 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 EE is at least 60% of the blade chord t of the aerodynamic profile in the cross-sectional plane E0, and the blade twist Θ of the aerodynamic profile in the cross-sectional plane EE is greater than the blade twist Θ of the aerodynamic profile in the cross-sectional plane E0.