Comparison of wind farm large eddy simulations using actuator disk and actuator line models with wind tunnel experiments

RENEWABLE ENERGY

卷:116

Article

Stevens, Richard J. A. M.^1,2  Martinez-Tossas, Luis A.^3,4  Meneveau, Charles^3,4 

[1] Univ Twente, Dept Phys, Mesa Inst, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, JM Burgers Ctr Fluid Dynam, NL-7500 AE Enschede, Netherlands

[3] Johns Hopkins Univ, Dept Mech Engn, Baltimore, MD 21218 USA

[4] Johns Hopkins Univ, Ctr Environm & Appl Fluid Mech, Baltimore, MD 21218 USA

关键词: Wind farm;    Large eddy simulations;    Actuator disk model;    Actuator line model;    Turbine wakes;   

DOI  :  10.1016/j.renene.2017.08.072

来源: Elsevier

【 摘 要 】

We compare wind farm large eddy simulations with the EPFL wind tunnel measurement by Chamorro and Porte-Agel (Bound-Lay. Meteorol. 136, 515 (2010) and Energies 4,1916 (2011)). We find that the near turbine wake, up to 3 turbine diameters downstream, of a single turbine is captured better with the actuator line method than using the actuator disk method. Further downstream the results obtained with both models agrees very well with the experimental data, confirming findings from previous studies. For large aligned wind farms we find that the actuator disk model predicts the wake profiles behind turbines on the second and subsequent rows more accurately than the wake profile behind the first turbine row. The reason is that the wake layer profile that is created at hub height in very large wind farms is closer to the assumptions made in the actuator disk model than the logarithmic.profile found in the inflow conditions. In addition, we show that, even in relatively coarse resolution simulations, adding the effect of the turbine nacelle and tower leads to a significant improvement in the prediction of the near wake features at 1 and 2 diameters downstream. (C) 2017 The Author(s). Published by Elsevier Ltd.

【 授权许可】

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