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Blad- Og Rotorlaster for VESTAS 15
註釋This report contains a comparison of measurements and calculations of aerodynamic blade- and rotor forces for a stall -controlled VESTAS 15 windmill.The investigation focuses on the situation in skew wind, as the blade forces are found as a function of the three basic parameters: windspeed,yaw angle and blade position. The comparison is based on stationary conditions, but measurements also give statistic loads superimposed on the dynamic loads that are already present under stationary conditions mainly in skew wind. Lift- and drag coefficients for the blade profiles are calculated iteratively from measurements of blade root bending moment in two directions as a function of windspeed under axial airflow.