Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Investigation of wake characteristics in turbulence of stable atmospheric boundary layer

안정경계층 난류에서의 터빈 후류 특성 연구

  • Na, Jisung (Department of Mechanical Engineering, Yonsei Univ.) ;
  • Ko, Seungchul (Department of Mechanical Engineering, Yonsei Univ.) ;
  • Lee, Joon Sang (Department of Mechanical Engineering, Yonsei University)
  • Received : 2016.12.21
  • Accepted : 2016.12.25
  • Published : 2016.12.31
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Abstract

In this study, we investigate the wake characteristics in two cases which are laminar inflow and turbulent inflow. To solve the flow with wind turbines and its wake, we use large eddy simulation (LES) technique with actuator line method (ALM) and turbulent inflow of Turbsim. Turbulent inflow which contains the characteristic of the stable atmospheric boundary layer is used. We perform the quantitative analysis of velocity deficit and turbulence intensity in two cases. Time series of velocity deficit at the first, the second column in two cases are compared to observe the performance of wind turbine. The performance in the first column in laminar inflow is overestimated compared to that in turbulent inflow. And we observe that wake in the case with turbulent inflow drive to the span-wise direction and wake recovery in turbulent inflow is more effective. In quadrant analysis of Reynolds stress, the ejection and the sweep motion in turbulent inflow case are bigger than those in laminar inflow case.

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References

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