Comparison of Engineering Wake Models with CFD Simulations

The Science of Making Torque from Wind 2014

Andersen, S.J.^1 ; Sørensen, J.N.^1 ; Ivanell, S.^2 ; Mikkelsen, R.F.^1

Department of Wind Energy, Building 403, Technical University of Denmark, DK-2800 Lyngby, Denmark^1

Wind Energy Campus Gotland, Dep. of Earth Sciences, Uppsala University, Visby, 621 67, Sweden^2

关键词: CFD simulations;    Expansion factors;    Far wakes;    Line methods;    Wake expansions;    Wake model;    Wake velocity;    Wind farm;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012161/pdf
DOI  :  10.1088/1742-6596/524/1/012161

来源: IOP

【 摘 要 】

The engineering wake models by Jensen [1] and Frandsen et al. [2] are assessed for different scenarios simulated using Large Eddy Simulation and the Actuator Line method implemented in the Navier-Stokes equations. The scenarios include the far wake behind a single wind turbine, a long row of turbines in an atmospheric boundary layer, idealised cases of an infinitely long row of wind turbines and infinite wind farms with three different spacings. Both models include a wake expansion factor, which is calibrated to fit the simulated wake velocities. The analysis highlights physical deficiencies in the ability of the models to universally predict the wake velocities, as the expansion factor can be fitted for a given case, but with not apparent transition between the cases.