Comparisons between the wake of a wind turbine generator operated at optimal tip speed ratio and the wake of a stationary disk

Takanori Uchida, Yuji Ohya, Kenichiro Sugitani

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Abstract

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 D (D: 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 (≤2D), and the velocity deficit in the far wake (10 D) of the stationary disk is smaller than that of the WTG.

Original languageEnglish
Article number749421
JournalModelling and Simulation in Engineering
Volume2011
DOIs
Publication statusPublished - Jun 22 2011

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All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Engineering(all)
  • Computer Science Applications

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