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

The Science of Making Torque from Wind

Rahimi, H.^1 ; Hartvelt, M.^3 ; Peinke, J.^1,2 ; Schepers, J.G.^3

Institute of Physics, University of Oldenburg, Oldenburg

26129, Germany^1

Fraunhofer IWES, Küpkersweg.70, Oldenburg

26129, Germany^2

ECN Wind Energy Technology, P.O. Box 1, Petten

NL-1755 ZG, Netherlands^3

关键词: Aerodynamic parameters;    Blade-element momentums;    Engineering models;    Engineering tools;    Free-vortex wake;    Induction factors;    Unsteady phenomena;    Wind tunnel measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/2/022016/pdf
DOI  :  10.1088/1742-6596/753/2/022016

来源: IOP

【 摘 要 】

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.