Effect of Wind Turbine Tail Flow Disturbance on the Atmospheric Bottom Boundary Layer

doi:10.11930/j.issn.1004-9649.201708056

Abstract

Abstract: The turbulent characteristics of wind turbine tail flow and its influence on the lower boundary layer of the atmosphere are of great importance. In this paper, the tail flow of single 5MW wind turbine under the same velocity profile but different temperature layers is numerically simulated by using Reynolds Average N-S equation (RANS). By analyzing the variation and characteristics of the meteorological factors of wind turbine downstream velocity, temperature and turbulence intensity in different settings, the influence mechanism of wind turbine operation on the lower boundary layer of atmosphere is obtained, which provides certain theoretical basis for the establishment of high efficiency wind farm. The results show that the wind flow velocity decreases significantly after passing through the wind turbine with the maximum attenuation occurrence near the hub. The temperature varies greatly under different stable layers. Meanwhile, the vortex produced by the blade rotation of the wind turbine interacts with each other, which will intensify the turbulence disturbance.

Key words: wind turbine, temperature stratification, turbulence disturbance, climate effect

CLC Number:

TM614

WU Zhengren, LI Fei, LU Tingting, LIU Mei. Effect of Wind Turbine Tail Flow Disturbance on the Atmospheric Bottom Boundary Layer[J]. Electric Power, 2018, 51(6): 144-149.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201708056

https://www.electricpower.com.cn/EN/Y2018/V51/I6/144

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