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Numerical study of wind turbine wakes over escarpments by a modified delayed detached eddy simulation
Abstract The wake of wind turbine in a complex terrain site is investigated by a modified delayed detached eddy simulation (MDDES) and a hybrid framework to predict the wind turbine wake effects in a real wind farm are presented. The wind field and turbine wake flows over the real terrain are simulated for different directions and validated by comparing with those measured by a LiDAR in the wind farm. Subsequently, the wake characteristics over the escarpment are systematically investigated by numerical simulations and the terrain effects on the turbine wake flow are clarified. A hybrid framework is then utilized for a wind farm over complex terrain. In this framework, the effects of local terrain and surface roughness on the wind speed, wind direction and turbulence intensity are taken into account by the numerical simulation, while the wind turbine wakes are represented by a new Gaussian-based analytical wake model. Finally, the applicability of the proposed framework is verified by comparison with the numerical simulation results of wake over the escarpment.
Highlights Numerical simulations on the wind turbine wake over complex terrain are conducted and validated by the field measurement. The wind turbine wake characteristics over the escarpment with different elevation are systematically investigated. A hybrid framework is utilized for wind turbine wake prediction over complex terrain and its applicability is verified.
Numerical study of wind turbine wakes over escarpments by a modified delayed detached eddy simulation
Abstract The wake of wind turbine in a complex terrain site is investigated by a modified delayed detached eddy simulation (MDDES) and a hybrid framework to predict the wind turbine wake effects in a real wind farm are presented. The wind field and turbine wake flows over the real terrain are simulated for different directions and validated by comparing with those measured by a LiDAR in the wind farm. Subsequently, the wake characteristics over the escarpment are systematically investigated by numerical simulations and the terrain effects on the turbine wake flow are clarified. A hybrid framework is then utilized for a wind farm over complex terrain. In this framework, the effects of local terrain and surface roughness on the wind speed, wind direction and turbulence intensity are taken into account by the numerical simulation, while the wind turbine wakes are represented by a new Gaussian-based analytical wake model. Finally, the applicability of the proposed framework is verified by comparison with the numerical simulation results of wake over the escarpment.
Highlights Numerical simulations on the wind turbine wake over complex terrain are conducted and validated by the field measurement. The wind turbine wake characteristics over the escarpment with different elevation are systematically investigated. A hybrid framework is utilized for wind turbine wake prediction over complex terrain and its applicability is verified.
Numerical study of wind turbine wakes over escarpments by a modified delayed detached eddy simulation
Qian, Guo-Wei (author) / Ishihara, Takeshi (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 191 ; 41-53
2019-05-12
13 pages
Article (Journal)
Electronic Resource
English
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