Effects of ambient turbulence on the near wake of a wind turbine
Effects of ambient turbulence on the near wake of a wind turbine
复制标题
环境湍流对风力涡轮机近尾流的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
T. Lutz
中科院分区：
文献类型：
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作者：
Yusik Kim;E. Jost;G. Bangga;P. Weihing;T. Lutz
Developments of the near wake behind the Avatar research turbine (radius of 102.88 m) in ambient turbulence are investigated using high fidelity numerical simulations. A moderate level of background turbulence with a wide range of scales, which has not been considered in the previous studies is applied. With ambient turbulence, a significant impact on the near wake development is observed. The mean velocity profile becomes Gaussian after 450 m distance downstream, which is a demarcation between the near and the far wake. From the spectral analysis of the wake, clear peaks in the spectra are observed at the blade passing frequency, but the distributions of the peak extend into a wide range of frequency domain. Such aspects provide useful information in classifying periodic and stochastic fluctuations, and their contributions to the momentum mixing in the wake.
