Investigation of the current yaw engineering models for simulation of wind turbines in BEM and comparison with CFD and experiment

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Abstract

The aim of this work is to investigate the capabilities of current engineering tools based on Blade Element Momentum (BEM) and free vortex wake codes for the prediction of key aerodynamic parameters of wind turbines in yawed flow. Axial induction factor and aerodynamic loads of three wind turbines (NREL VI, AVATAR and INNWIND.EU) were investigated using wind tunnel measurements and numerical simulations for 0 and 30 degrees of yaw. Results indicated that for axial conditions there is a good agreement between all codes in terms of mean values of aerodynamic parameters, however in yawed flow significant deviations were observed. This was due to unsteady phenomena such as advancing & retreating and skewed wake effect. These deviations were more visible in aerodynamic parameters in comparison to the rotor azimuthal angle for the sections at the root and tip where the skewed wake effect plays a major role.

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Rahimi, H., Hartvelt, M., Peinke, J., & Schepers, J. G. (2016). Investigation of the current yaw engineering models for simulation of wind turbines in BEM and comparison with CFD and experiment. In Journal of Physics: Conference Series (Vol. 753). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/753/2/022016

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