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Computational study and modeling of turbine spacing effects in infinite aligned wind farms

Title
Computational study and modeling of turbine spacing effects in infinite aligned wind farms
Author
강석구
Keywords
IMMERSED BOUNDARY METHOD; LARGE-EDDY SIMULATION; NUMERICAL SIMULATIONS; TURBULENT FLOWS; WAKES; LAYER; INFLOW; ARRAYS; TUNNEL
Issue Date
2012-11
Publisher
American Institute of Physics
Citation
Physics of Fluids, 2012, 24(11), P.115107
Abstract
We study the turbine spacing effects in infinite, aligned wind-turbine arrays using large-eddy simulation (LES) with the wind turbine rotors parameterized as actuator disks. A series of simulations is carried out to systematically investigate the different effects of streamwise and spanwise turbine spacings on the array power output and turbulence intensities. We show that for the same turbine density, increasing the streamwise spacing is more beneficial than increasing the spanwise spacing. Larger streamwise turbine spacing increases the power extraction and lowers the turbulence intensity at each turbine more efficiently than when the spanwise turbine spacing is increased. The reason for the different effects of streamwise and spanwise turbine spacings on wind farm performance is that the wake recovery of wind turbines in infinite arrays depends on the area influenced by the wind-turbine wakes, rather than the land area occupied by each turbine. Based on this idea, an improved effective roughness height model is proposed, which can account for the different effects of streamwise and spanwise turbine spacings in infinite aligned wind farms. The predictive capabilities of the new model are demonstrated via extensive comparisons with results obtained from the LES and previously proposed roughness height models.
URI
https://aip.scitation.org/doi/10.1063/1.4767727http://hdl.handle.net/20.500.11754/50956
ISSN
1070-6631; 0031-9171
DOI
10.1063/1.4767727
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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