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Title: Large-eddy simulations of wind-farm wake characteristics associated with a low-level jet

Abstract

Here, we performed a suite of flow simulations for a 12-wind-turbine array with varying inflow conditions and lateral spacings, and compared the impacts of the flow on velocity deficit and wake recovery. We imposed both laminar inflow and turbulent inflows, which contain turbulence for the Ekman layer and a low-level jet (LLJ) in the stable boundary layer. To solve the flow through the wind turbines and their wakes, we used a large-eddy simulation technique with an actuator-line method. We compared the time series for the velocity deficit at the first and rear columns to observe the temporal change in velocity deficit for the entire wind farm. The velocity deficit at the first column for LLJ inflow was similar to that for laminar inflow. However, the magnitude of velocity deficit at the rear columns for the case with LLJ inflow was 11.9% greater because of strong wake recovery, which was enhanced by the vertical flux of kinetic energy associated with the LLJ. In order to observe the spatial transition and characteristics of wake recovery, we performed statistical analyses of the velocity at different locations for both the laminar and LLJ inflows. These studies indicated that strong wake recovery was present, andmore » a kurtosis analysis showed that the probability density function for the streamwise velocity followed a Gaussian distribution. In a quadrant analysis of the Reynolds stress, we found that the ejection and sweep motions for the LLJ inflow case were greater than those for the laminar inflow case.« less

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [1]; ORCiD logo [4]; ORCiD logo [1]
  1. Yonsei Univ., Seoul (South Korea). Dept. of Mechanical Engineering
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Science
  3. Korea Inst. of Atmospheric Prediction Systems, Seoul (South Korea)
  4. National Center for Atmospheric Research, Boulder, CO (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
Ministry of Trade, Industry, and Energy (MOTIE); National Research Foundation of Korea (NRF); USDOE
OSTI Identifier:
1411349
Report Number(s):
LA-UR-17-23268
Journal ID: ISSN 1095-4244
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Wind Energy
Additional Journal Information:
Journal Volume: 21; Journal Issue: 3; Journal ID: ISSN 1095-4244
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Earth Sciences

Citation Formats

Na, Ji Sung, Koo, Eunmo, Jin, Emilia Kyung, Linn, Rodman, Ko, Seung Chul, Muñoz-Esparza, Domingo, and Lee, Joon Sang. Large-eddy simulations of wind-farm wake characteristics associated with a low-level jet. United States: N. p., 2017. Web. doi:10.1002/we.2152.
Na, Ji Sung, Koo, Eunmo, Jin, Emilia Kyung, Linn, Rodman, Ko, Seung Chul, Muñoz-Esparza, Domingo, & Lee, Joon Sang. Large-eddy simulations of wind-farm wake characteristics associated with a low-level jet. United States. doi:10.1002/we.2152.
Na, Ji Sung, Koo, Eunmo, Jin, Emilia Kyung, Linn, Rodman, Ko, Seung Chul, Muñoz-Esparza, Domingo, and Lee, Joon Sang. Fri . "Large-eddy simulations of wind-farm wake characteristics associated with a low-level jet". United States. doi:10.1002/we.2152. https://www.osti.gov/servlets/purl/1411349.
@article{osti_1411349,
title = {Large-eddy simulations of wind-farm wake characteristics associated with a low-level jet},
author = {Na, Ji Sung and Koo, Eunmo and Jin, Emilia Kyung and Linn, Rodman and Ko, Seung Chul and Muñoz-Esparza, Domingo and Lee, Joon Sang},
abstractNote = {Here, we performed a suite of flow simulations for a 12-wind-turbine array with varying inflow conditions and lateral spacings, and compared the impacts of the flow on velocity deficit and wake recovery. We imposed both laminar inflow and turbulent inflows, which contain turbulence for the Ekman layer and a low-level jet (LLJ) in the stable boundary layer. To solve the flow through the wind turbines and their wakes, we used a large-eddy simulation technique with an actuator-line method. We compared the time series for the velocity deficit at the first and rear columns to observe the temporal change in velocity deficit for the entire wind farm. The velocity deficit at the first column for LLJ inflow was similar to that for laminar inflow. However, the magnitude of velocity deficit at the rear columns for the case with LLJ inflow was 11.9% greater because of strong wake recovery, which was enhanced by the vertical flux of kinetic energy associated with the LLJ. In order to observe the spatial transition and characteristics of wake recovery, we performed statistical analyses of the velocity at different locations for both the laminar and LLJ inflows. These studies indicated that strong wake recovery was present, and a kurtosis analysis showed that the probability density function for the streamwise velocity followed a Gaussian distribution. In a quadrant analysis of the Reynolds stress, we found that the ejection and sweep motions for the LLJ inflow case were greater than those for the laminar inflow case.},
doi = {10.1002/we.2152},
journal = {Wind Energy},
number = 3,
volume = 21,
place = {United States},
year = {2017},
month = {11}
}

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Works referenced in this record:

Near-wake flow structure downwind of a wind turbine in a turbulent boundary layer
journal, December 2011

  • Zhang, Wei; Markfort, Corey D.; Porté-Agel, Fernando
  • Experiments in Fluids, Vol. 52, Issue 5
  • DOI: 10.1007/s00348-011-1250-8

A Comparison of Shear- and Buoyancy-Driven Planetary Boundary Layer Flows
journal, April 1994


Large eddy simulations of the flow past wind turbines: actuator line and disk modeling: LES of the flow past wind turbines: actuator line and disk modeling
journal, April 2014

  • Martínez-Tossas, Luis A.; Churchfield, Matthew J.; Leonardi, Stefano
  • Wind Energy, Vol. 18, Issue 6
  • DOI: 10.1002/we.1747

Large eddy simulation studies of the effects of alignment and wind farm length
journal, March 2014

  • Stevens, Richard J. A. M.; Gayme, Dennice F.; Meneveau, Charles
  • Journal of Renewable and Sustainable Energy, Vol. 6, Issue 2
  • DOI: 10.1063/1.4869568

Numerical simulations of wake interaction between two wind turbines at various inflow conditions
journal, October 2010

  • Troldborg, Niels; Larsen, Gunner C.; Madsen, Helge A.
  • Wind Energy, Vol. 14, Issue 7, p. 859-876
  • DOI: 10.1002/we.433

Large Eddy Simulation of Wind Turbine Wakes
journal, June 2013

  • Chatelain, Philippe; Backaert, Stéphane; Winckelmans, Grégoire
  • Flow, Turbulence and Combustion, Vol. 91, Issue 3
  • DOI: 10.1007/s10494-013-9474-8

MPDATA: A Finite-Difference Solver for Geophysical Flows
journal, March 1998

  • Smolarkiewicz, Piotr K.; Margolin, Len G.
  • Journal of Computational Physics, Vol. 140, Issue 2
  • DOI: 10.1006/jcph.1998.5901

Coherent Structures near the Surface in a Strongly Sheared Convective Boundary Layer Generated by Large-Eddy Simulation
journal, January 2003


Coupled Atmospheric–Fire Modeling Employing the Method of Averages
journal, October 2000


The impact of stable atmospheric boundary layers on wind-turbine wakes within offshore wind farms
journal, September 2015

  • Dörenkämper, Martin; Witha, Björn; Steinfeld, Gerald
  • Journal of Wind Engineering and Industrial Aerodynamics, Vol. 144
  • DOI: 10.1016/j.jweia.2014.12.011

A concurrent precursor inflow method for Large Eddy Simulations and applications to finite length wind farms
journal, August 2014


Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer
journal, January 2016


Large-eddy simulation of a very large wind farm in a stable atmospheric boundary layer
journal, June 2011

  • Lu, Hao; Porté-Agel, Fernando
  • Physics of Fluids, Vol. 23, Issue 6
  • DOI: 10.1063/1.3589857

Experimental analysis of the wake of a horizontal-axis wind-turbine model
journal, October 2014


Large-Eddy Simulations of Air Flow and Turbulence within and around Low-Aspect-Ratio Cylindrical Open-Top Chambers
journal, August 2013

  • Cunningham, Philip; Linn, Rodman R.; Koo, Eunmo
  • Journal of Applied Meteorology and Climatology, Vol. 52, Issue 8
  • DOI: 10.1175/JAMC-D-12-041.1

Validation of FIRETEC wind-flows over a canopy and a fuel-break
journal, January 2009

  • Pimont, François; Dupuy, Jean-Luc; Linn, Rodman R.
  • International Journal of Wildland Fire, Vol. 18, Issue 7
  • DOI: 10.1071/WF07130

Characteristics of turbine spacing in a wind farm using an optimal design process
journal, May 2014


Large eddy simulation of a large wind-turbine array in a conventionally neutral atmospheric boundary layer
journal, June 2015

  • Allaerts, Dries; Meyers, Johan
  • Physics of Fluids, Vol. 27, Issue 6
  • DOI: 10.1063/1.4922339

A Large Eddy Simulation Study of a Quasi-Steady, Stably Stratified Atmospheric Boundary Layer
journal, April 2000


Optimal turbine spacing in fully developed wind farm boundary layers
journal, April 2011

  • Meyers, Johan; Meneveau, Charles
  • Wind Energy, Vol. 15, Issue 2, p. 305-317
  • DOI: 10.1002/we.469

Reynolds number dependence of turbulence statistics in the wake of wind turbines: Reynolds dependence of wind turbine wakes
journal, September 2011

  • Chamorro, Leonardo P.; Arndt, R. E. A.; Sotiropoulos, F.
  • Wind Energy, Vol. 15, Issue 5
  • DOI: 10.1002/we.501

Investigation of Kelvin-Helmholtz instability in the stable boundary layer using large eddy simulation
journal, July 2014

  • Na, Ji Sung; Jin, Emilia Kyung; Lee, Joon Sang
  • Journal of Geophysical Research: Atmospheres, Vol. 119, Issue 13
  • DOI: 10.1002/2013JD021414

Canopy element influences on resolved- and subgrid-scale energy within a large-eddy simulation
journal, February 2003


A Numerical Study of the Effects of Wind Direction on Turbine Wakes and Power Losses in a Large Wind Farm
journal, October 2013

  • Porté-Agel, Fernando; Wu, Yu-Ting; Chen, Chang-Hung
  • Energies, Vol. 6, Issue 10
  • DOI: 10.3390/en6105297

A simple atmospheric boundary layer model applied to large eddy simulations of wind turbine wakes: A simple ABL model applied to LES of wind turbine wakes
journal, April 2013

  • Troldborg, Niels; Sørensen, Jens N.; Mikkelsen, Robert
  • Wind Energy, Vol. 17, Issue 4
  • DOI: 10.1002/we.1608