Comparisons between the Wake of a Wind Turbine Generator Operated at Optimal Tip Speed Ratio and the Wake of a Stationary Disk | Zendy

Takanori Uchida | Zendy; Yuji Ohya | Zendy; Kenichiro Sugitani | Zendy

Open Access

Comparisons between the Wake of a Wind Turbine Generator Operated at Optimal Tip Speed Ratio and the Wake of a Stationary Disk

Author(s) -

Takanori Uchida,

Yuji Ohya,

Kenichiro Sugitani

Publication year - 2011

Publication title -

modelling and simulation in engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.264

H-Index - 20

eISSN - 1687-5591

pISSN - 1687-5605

DOI - 10.1155/2011/749421

Subject(s) - wake , turbine , mechanics , inflow , rotor (electric) , wind speed , physics , tip speed ratio , meteorology , environmental science , aerospace engineering , engineering , aerodynamics , electrical engineering

The wake of a wind turbine generator (WTG) operated at the optimal tip speed ratio is compared to the wake of a WTG with its rotor replaced by a stationary disk. Numerical simulations are conducted with a large eddy simulation (LES) model using a nonuniform staggered Cartesian grid. The results from the numerical simulations are compared to those from wind-tunnel experiments. The characteristics of the wake of the stationary disk are significantly different from those of the WTG. The velocity deficit at a downstream distance of 10 (: rotor diameter) behind the WTG is approximately 30 to 40% of the inflow velocity. In contrast, flow separation is observed immediately behind the stationary disk (≤2), and the velocity deficit in the far wake (10) of the stationary disk is smaller than that of the WTG

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