Large Eddy Simulation of wind turbine wakes: detailed comparisons of two codes focusing on effects of numerics and subgrid modeling

Wake Conference 2015

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: Finite volume code;    Johns hopkins universities;    Low dissipations;    National Renewable Energy Laboratory;    Sub-grid scale models;    Turbulent state;    Uniform inflow;    Wind turbine wakes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/625/1/012024/pdf
DOI  :  10.1088/1742-6596/625/1/012024

来源: IOP

【 摘 要 】

In this work we report on results from a detailed comparative numerical study from two Large Eddy Simulation (LES) codes using the Actuator Line Model (ALM). The study focuses on prediction of wind turbine wakes and their breakdown when subject to uniform inflow. Previous studies have shown relative insensitivity to subgrid modeling in the context of a finite-volume code. The present study uses the low dissipation pseudo-spectral LES code from Johns Hopkins University (LESGO) and the second-order, finite-volume OpenFOAMcode (SOWFA) from the National Renewable Energy Laboratory. When subject to uniform inflow, the loads on the blades are found to be unaffected by subgrid models or numerics, as expected. The turbulence in the wake and the location of transition to a turbulent state are affected by the subgrid-scale model and the numerics.