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

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...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 625; no. 1; pp. 12024 - 12033
Main Authors Martínez-Tossas, Luis A, Churchfield, Matthew J, Meneveau, Charles
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 18.06.2015
Subjects
Actuators
Inflow
Large eddy simulation
large eddy simulations
Mathematical models
Physics
Subgrid scale models
Turbulence
Vortices
Wakes
WIND ENERGY
wind turbine wakes
Wind turbines
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Summary: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.
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USDOE
AC36-08GO28308
NREL/JA-5000-64912
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/625/1/012024