A concurrent precursor inflow method for Large Eddy Simulations and applications to finite length wind farms

RENEWABLE ENERGY

卷:68

Article

Stevens, Richard J. A. M.^1,2,3  Graham, Jason¹  Meneveau, Charles¹ 

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

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

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

关键词: Wind-farm simulations;    Large Eddy Simulation;    Precursor simulation;    Inflow conditions;   

DOI  :  10.1016/j.renene.2014.01.024

来源: Elsevier

【 摘 要 】

In order to enable simulations of developing wind turbine array boundary layers with highly realistic inflow conditions a concurrent precursor method for Large Eddy Simulations is proposed. In this method we consider two domains simultaneously, i.e. in one domain a turbulent Atmospheric Boundary Layer (ABL) without wind turbines is simulated in order to generate the turbulent inflow conditions for a second domain in which the wind turbines are placed. The benefit of this approach is that a) it avoids the need for large databases in which the turbulent inflow conditions are stored and the correspondingly slow I/O operations and b) we are sure that the simulations are not negatively affected by statically swept fixed inflow fields or synthetic fields lacking the proper ABL coherent structures. Sample applications are presented, in which, in agreement with field data a strong decrease of the power output of downstream wind-turbines with respect to the first row of wind-turbines is observed for perfectly aligned inflow. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

Free