Investigation of a new model accounting for rotors of finite tip-speed ratio in yaw or tilt

The Science of Making Torque from Wind 2014

Branlard, E.^1 ; Gaunaa, M.^1 ; MacHefaux, E.^1

Department of Wind Energy, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000, Denmark^1

关键词: 2D airfoils;    BEM code;    Blade-element momentums;    Induced velocity;    Me-xico;    Tip speed ratio;    Vortex model;    Yaw model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012124/pdf
DOI  :  10.1088/1742-6596/524/1/012124

来源: IOP

【 摘 要 】

The main results from a recently developed vortex model are implemented into a Blade Element Momentum(BEM) code. This implementation accounts for the effect of finite tip-speed ratio, an effect which was not considered in standard BEM yaw-models. The model and its implementation are presented. Data from the MEXICO experiment are used as a basis for validation. Three tools using the same 2D airfoil coefficient data are compared: a BEM code, an Actuator-Line and a vortex code. The vortex code is further used to validate the results from the newly implemented BEM yaw-model. Significant improvements are obtained for the prediction of loads and induced velocities. Further relaxation of the main assumptions of the model are briefly presented and discussed.