Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer
Abstract
High-resolution large-eddy simulation of the flow over a large wind farm (64 wind turbines) is performed using the HIGRAD/FIRETEC-WindBlade model, which is a high-performance computing wind turbine–atmosphere interaction model that uses the Lagrangian actuator line method to represent rotating turbine blades. These high-resolution large-eddy simulation results are used to parameterize the thrust and power coefficients that contain information about turbine interference effects within the wind farm. Those coefficients are then incorporated into the WRF (Weather Research and Forecasting) model in order to evaluate interference effects in larger-scale models. In the high-resolution WindBlade wind farm simulation, insufficient distance between turbines creates the interference between turbines, including significant vertical variations in momentum and turbulent intensity. The characteristics of the wake are further investigated by analyzing the distribution of the vorticity and turbulent intensity. Quadrant analysis in the turbine and post-turbine areas reveals that the ejection motion induced by the presence of the wind turbines is dominant compared to that in the other quadrants, indicating that the sweep motion is increased at the location where strong wake recovery occurs. Regional-scale WRF simulations reveal that although the turbulent mixing induced by the wind farm is partly diffused to the upper region, there is nomore »
- Authors:
-
- Yonsei Univ., Seoul (Republic of Korea)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Korea Institute of Atmospheric Prediction System (KIAPS), Seoul (Republic of Korea)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1255115
- Alternate Identifier(s):
- OSTI ID: 1359055
- Report Number(s):
- LA-UR-15-28075
Journal ID: ISSN 0360-5442; PII: S036054421501590X
- Grant/Contract Number:
- 2013R1A2A2A01015333; 2015R1A5A1037668; 20100040DR; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Energy
- Additional Journal Information:
- Journal Volume: 95; Journal Issue: C; Journal ID: ISSN 0360-5442
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 17 WIND ENERGY; large wind farm; actuator line method; large-eddy simulation; regional-scale simulation; wind farm parameterization; neutral boundary layer
Citation Formats
Na, Ji Sung, Koo, Eunmo, Munoz-Esparza, Domingo, Jin, Emilia Kyung, Linn, Rodman, and Lee, Joon Sang. Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer. United States: N. p., 2015.
Web. doi:10.1016/j.energy.2015.11.040.
Na, Ji Sung, Koo, Eunmo, Munoz-Esparza, Domingo, Jin, Emilia Kyung, Linn, Rodman, & Lee, Joon Sang. Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer. United States. https://doi.org/10.1016/j.energy.2015.11.040
Na, Ji Sung, Koo, Eunmo, Munoz-Esparza, Domingo, Jin, Emilia Kyung, Linn, Rodman, and Lee, Joon Sang. Mon .
"Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer". United States. https://doi.org/10.1016/j.energy.2015.11.040. https://www.osti.gov/servlets/purl/1255115.
@article{osti_1255115,
title = {Turbulent kinetics of a large wind farm and their impact in the neutral boundary layer},
author = {Na, Ji Sung and Koo, Eunmo and Munoz-Esparza, Domingo and Jin, Emilia Kyung and Linn, Rodman and Lee, Joon Sang},
abstractNote = {High-resolution large-eddy simulation of the flow over a large wind farm (64 wind turbines) is performed using the HIGRAD/FIRETEC-WindBlade model, which is a high-performance computing wind turbine–atmosphere interaction model that uses the Lagrangian actuator line method to represent rotating turbine blades. These high-resolution large-eddy simulation results are used to parameterize the thrust and power coefficients that contain information about turbine interference effects within the wind farm. Those coefficients are then incorporated into the WRF (Weather Research and Forecasting) model in order to evaluate interference effects in larger-scale models. In the high-resolution WindBlade wind farm simulation, insufficient distance between turbines creates the interference between turbines, including significant vertical variations in momentum and turbulent intensity. The characteristics of the wake are further investigated by analyzing the distribution of the vorticity and turbulent intensity. Quadrant analysis in the turbine and post-turbine areas reveals that the ejection motion induced by the presence of the wind turbines is dominant compared to that in the other quadrants, indicating that the sweep motion is increased at the location where strong wake recovery occurs. Regional-scale WRF simulations reveal that although the turbulent mixing induced by the wind farm is partly diffused to the upper region, there is no significant change in the boundary layer depth. The velocity deficit does not appear to be very sensitive to the local distribution of turbine coefficients. However, differences of about 5% on parameterized turbulent kinetic energy were found depending on the turbine coefficient distribution. Furthermore, turbine coefficients that consider interference in the wind farm should be used in wind farm parameterization for larger-scale models to better describe sub-grid scale turbulent processes.},
doi = {10.1016/j.energy.2015.11.040},
journal = {Energy},
number = C,
volume = 95,
place = {United States},
year = {Mon Dec 28 00:00:00 EST 2015},
month = {Mon Dec 28 00:00:00 EST 2015}
}
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Works referencing / citing this record:
Wind-Turbine and Wind-Farm Flows: A Review
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