4.7 Article

Effects of atmospheric stability on the performance of a wind turbine located behind a three-dimensional hill

期刊

RENEWABLE ENERGY
卷 175, 期 -, 页码 926-935

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.05.035

关键词

Atmospheric boundary layer; Atmospheric stability; Large eddy simulation; Power output; Three-dimensional hill; Wind turbine wake

资金

  1. STW VIDI Grant [14868]

向作者/读者索取更多资源

The impact of thermal stratification on wind turbine wakes in complex terrain was studied using large eddy simulations. Results showed that a hill wake significantly reduced power production of a downstream turbine in a convective boundary layer, but surprisingly increased power production in a stable boundary layer. This increase was attributed to enhanced mixing induced by the hill wake, leading to entrainment of kinetic energy from a low-level jet.
Understanding the effect of thermal stratification on wind turbine wakes in complex terrain is essential to optimize wind farm design. The effect of a three-dimensional hill on the performance of a downwind turbine is studied by performing large eddy simulations for different atmospheric conditions. The dis-tance between the hill and the turbine is six times the turbine diameter, and the hill height is equal to the hub height. It is shown that the hill wake reduces the power production of the downstream turbine by 35% for the convective boundary layer case under consideration. However, surprisingly, the wind turbine power production is increased by about 24% for the stable boundary layer case considered here. This phenomenon results from the entrainment of kinetic energy from the low-level jet due to the increased mixing induced by the hill wake. This effect strongly depends on the Coriolis force-induced wind veer. The increased turbulence intensity by the hill results in a strong increase in the forces experienced by the blades, which suggest the turbine is experiencing much higher unsteady turbulence loading. It is shown that the increase in the power fluctuations may not fully reflect the increase in the force fluctuations on the blades. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据