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Title: Large-eddy simulation sensitivities to variations of configuration and forcing parameters in canonical boundary-layer flows for wind energy applications

Journal Article · · Wind Energy Science (Online)

Abstract. The sensitivities of idealized large-eddy simulations (LESs) to variations ofmodel configuration and forcing parameters on quantities of interest to windpower applications are examined. Simulated wind speed, turbulent fluxes,spectra and cospectra are assessed in relation to variations in two physicalfactors, geostrophic wind speed and surface roughness length, and severalmodel configuration choices, including mesh size and grid aspect ratio,turbulence model, and numerical discretization schemes, in three differentcode bases. Two case studies representing nearly steady neutral andconvective atmospheric boundary layer (ABL) flow conditions over nearly flatand homogeneous terrain were used to force and assess idealized LESs, usingperiodic lateral boundary conditions. Comparison with fast-response velocitymeasurements at 10 heights within the lowest 100m indicates that most modelconfigurations performed similarly overall, with differences between observedand predicted wind speed generally smaller than measurement variability.Simulations of convective conditions produced turbulence quantities andspectra that matched the observations well, while those of neutralsimulations produced good predictions of stress, but smaller than observedmagnitudes of turbulence kinetic energy, likely due to tower wakesinfluencing the measurements. While sensitivities to model configurationchoices and variability in forcing can be considerable, idealized LESs areshown to reliably reproduce quantities of interest to wind energyapplications within the lower ABL during quasi-ideal, nearly steady neutraland convective conditions over nearly flat and homogeneous terrain.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; AC52-06NA25396; AC36-08GO28308; AC02-06CH11357; AC05-76RL01830; NA0003525
OSTI ID:
1468493
Alternate ID(s):
OSTI ID: 1477683; OSTI ID: 1544964; OSTI ID: 1557671; OSTI ID: 1578044
Report Number(s):
LA-UR-17-27934; LLNL-JRNL-759146; PNNL-SA-132498
Journal Information:
Wind Energy Science (Online), Journal Name: Wind Energy Science (Online) Vol. 3 Journal Issue: 2; ISSN 2366-7451
Publisher:
European Wind Energy Association - CopernicusCopyright Statement
Country of Publication:
Germany
Language:
English

References (37)

Field Measurements of Wind Turbine Wakes with Lidars journal February 2013
Large eddy simulation of wind turbine wake dynamics in the stable boundary layer using the Weather Research and Forecasting Model journal May 2014
Coupled mesoscale‐ LES modeling of a diurnal cycle during the CWEX ‐13 field campaign: From weather to boundary‐layer eddies journal July 2017
Numerical simulations of wake interaction between two wind turbines at various inflow conditions journal October 2010
Implications of Stably Stratified Atmospheric Boundary Layer Turbulence on the Near-Wake Structure of Wind Turbines journal September 2014
A Large-Eddy Simulation Study of Atmospheric Boundary Layer Influence on Stratified Flows over Terrain journal July 2016
Implementation of a Nonlinear Subfilter Turbulence Stress Model for Large-Eddy Simulation in the Advanced Research WRF Model journal November 2010
A stochastic perturbation method to generate inflow turbulence in large-eddy simulation models: Application to neutrally stratified atmospheric boundary layers journal March 2015
Review of computational fluid dynamics for wind turbine wake aerodynamics journal February 2011
Generation of Turbulent Inflow Data for Spatially-Developing Boundary Layer Simulations journal March 1998
The Effect of Wind-Turbine Wakes on Summertime US Midwest Atmospheric Wind Profiles as Observed with Ground-Based Doppler Lidar journal July 2013
Subgrid-scale modeling for large-eddy simulations of compressible turbulence journal April 2002
Resolved Turbulence Characteristics in Large-Eddy Simulations Nested within Mesoscale Simulations Using the Weather Research and Forecasting Model journal February 2014
Bridging the Transition from Mesoscale to Microscale Turbulence in Numerical Weather Prediction Models journal August 2014
Stratocumulus-capped mixed layers derived from a three-dimensional model journal June 1980
Measuring a Utility-Scale Turbine Wake Using the TTUKa Mobile Research Radars journal June 2012
Large-eddy simulation of a very large wind farm in a stable atmospheric boundary layer journal June 2011
A subgrid-scale model for large-eddy simulation of planetary boundary-layer flows journal November 1994
A methodology for the design and testing of atmospheric boundary layer models for wind energy applications journal January 2017
Subgrid-scale modelling for the large-eddy simulation of high-Reynolds-number boundary layers journal April 1997
Spatiotemporal Variability of Turbulence Kinetic Energy Budgets in the Convective Boundary Layer over Both Simple and Complex Terrain journal December 2017
An Introduction to Boundary Layer Meteorology book January 1988
SWiFT site atmospheric characterization report January 2016
Lidar Investigation of Atmosphere Effect on a Wind Turbine Wake journal November 2013
Designing large-eddy simulation of the turbulent boundary layer to capture law-of-the-wall scaling journal February 2010
Large Eddy Simulation of wind farm aerodynamics: A review journal October 2014
Efficient Generation of Inflow Conditions for Large Eddy Simulation of Street-Scale Flows journal April 2008
A numerical study of the effects of atmospheric and wake turbulence on wind turbine dynamics journal January 2012
A field study of the wake behind a 2 MW wind turbine journal January 1988
RAMS sensitivity to grid spacing and grid aspect ratio in Large-Eddy Simulations of the dry neutral Atmospheric Boundary Layer journal March 2017
A numerical study of three-dimensional turbulent channel flow at large Reynolds numbers journal April 1970
Comparison of Measured and Numerically Simulated Turbulence Statistics in a Convective Boundary Layer Over Complex Terrain journal November 2016
The Influence of Stable Boundary Layer Flows on Wind Turbine Fatigue Loads
  • Sim, Chungwook; Basu, Sukanta; Manuel, Lance
  • 47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition https://doi.org/10.2514/6.2009-1405
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Evaluating Mesoscale NWP Models Using Kinetic Energy Spectra journal December 2004
Quantifying the Impact of Wind Turbine Wakes on Power Output at Offshore Wind Farms journal August 2010
Research Needs For Wind Resource Characterization journal April 2009
Implementation of a generalized actuator disk wind turbine model into the weather research and forecasting model for large-eddy simulation applications journal January 2014

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