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Hybrid RANS-LES of the Atmospheric Boundary Layer for Wind Farm Simulations

Conference ·
DOI:https://doi.org/10.2514/6.2022-1922· OSTI ID:1845668
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Wind farm simulations often do not accurately represent wake-atmospheric boundary layer (ABL) interactions, blade boundary layer (BL) dynamics, and turbine-turbine interactions. In this work, we use Active Model Split (AMS), a new hybrid Reynolds-Averaged Navier Stokes (RANS)-large eddy simulation (LES) model, which is well suited to capture these effects because the model can (i) accurately simulate the ABL with the Coriolis effect, (ii) is accurate in adverse pressure gradients such as those near wind turbine blades, and (iii) has sufficiently low computational cost to simulate multiple turbines while resolving the blade BL. For simplicity and consistency we develop AMS to be used throughout the domain rather than in a zonal method. We implement our work in the massively parallel flow solver, Nalu-Wind, so that our model can access the compute resources needed for blade-resolved simulations of multiple wind turbines. To accomplish these aims, we modify the baseline AMS by changing the RANS contribution to SST k - omega with a length scale limiter, adding the Coriolis effect, and developing an appropriate wall treatment. We show that AMS of the ABL with the Coriolis effect matches LES reference results better than those obtained with RANS. We describe our plans to add buoyancy effects and wind turbines to our AMS simulations.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Computational Science Graduate Fellowship; USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); USDOE Exascale Computing Project; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1845668
Report Number(s):
NREL/CP-2C00-80183; MainId:42386; UUID:934068f3-084c-44ac-97df-6d1c3222e874; MainAdminID:61671
Country of Publication:
United States
Language:
English

References (12)

Towards a Predictive Hybrid RANS/LES Framework conference January 2019
Hybrid LES/RANS methods for the simulation of turbulent flows journal July 2008
Interaction of Atmospheric Turbulence with Blade Boundary Layer Dynamics on a 5MW Wind Turbine using Blade-boundary-layer-resolved CFD with hybrid URANS-LES conference January 2016
The vertical distribution of wind and turbulent exchange in a neutral atmosphere journal July 1962
ExaWind: A multifidelity modeling and simulation environment for wind energy journal January 2020
Wind-Turbine and Wind-Farm Flows: A Review journal September 2019
Review of computational fluid dynamics for wind turbine wake aerodynamics journal February 2011
Separated flow computations with the k-epsilon-v-squared model journal April 1995
Resolution-induced anisotropy in large-eddy simulations journal November 2019
General Circulation Experiments with the Primitive Equations: i. the Basic Experiment* journal March 1963
Detached-Eddy Simulation journal January 2009
Some aspects of the structure of the stably stratified atmospheric boundary layer journal August 1979

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Related Subjects

MATHEMATICS AND COMPUTING
WIND ENERGY
atmospheric boundary layer
hybrid RANS-LES