A Highly Resolved Large-Eddy Simulation of a Wind Turbine using an Actuator Line Model with Optimal Body Force Projection

The Science of Making Torque from Wind

Martínez-Tossas, Luis A.^1 ; Churchfield, Matthew J.^2 ; Meneveau, Charles^1

Johns Hopkins University, Baltimore

MD, United States^1

National Renewable Energy Laboratory, Golden

CO, United States^2

关键词: Blade aerodynamic;    Body forces;    Full three-dimensional;    Gaussian kernels;    Line models;    Local flow field;    Optimal scale;    Two-dimension;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/8/082014/pdf
DOI  :  10.1088/1742-6596/753/8/082014

来源: IOP

【 摘 要 】

When representing the blade aerodynamics with rotating actuator lines, the computed forces have to be projected back to the CFD flow field as a volumetric body force. That has been done in the past with a geometrically simple uniform three-dimensional Gaussian at each point along the blade. We argue that the body force can be shaped in a way that better predicts the blade local flow field, the blade load distribution, and the formation of the tip/root vortices. In previous work, we have determined the optimal scales of circular and elliptical Gaussian kernels that best reproduce the local flow field in two-dimensions. In this work we extend the analysis and applications by considering the full three-dimensional blade to test our hypothesis in a highly resolved Large Eddy Simulation.