Investigation of modified AD/RANS models for wind turbine wake predictions in large wind farm

The Science of Making Torque from Wind 2014

Tian, L.L.^1,2 ; Zhu, W.J.^2 ; Shen, W.Z.^2 ; Sørensen, J.N.^2 ; Zhao, N.^1

College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, China^1

Department of Wind Energy, Fluid Mechanics Section, Technical University of Denmark, DK-2800, Lyngby, Denmark^2

关键词: Average power;    Comparisons with measurements;    Inflow conditions;    Modified turbulence models;    Power out put;    SST turbulence models;    Wind directions;    Wind turbine wakes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012151/pdf
DOI  :  10.1088/1742-6596/524/1/012151

来源: IOP

【 摘 要 】

Average power losses due to multiple wind turbine wakes in the large offshore wind farm is studied in this paper using properly modified k-ω SST turbulence models. The numerical simulations are carried out by the actuator disc methodology implemented in the flow solver EllipSys3D. In these simulations, the influence of different inflow conditions such as wind direction sectors are considered and discussed. Comparisons with measurements in terms of wake speed ratio and the corresponding power outputs show that the modified turbulence models had significant improvements; especially the SST-Csust model reflects the best ability in predicting the wake defect. The investigations of various inflow angles reveal that the agreement between predicted and measured data is improved for the wider sector case than the narrow case because of the wind direction uncertainty.