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摘要:
Knowledge about the structure and development of wakes behind wind turbines is important for power optimization of wind power farms. The high turbulence levels in the wakes give rise to undesired unsteady loadings on the downstream turbines, which in the long run might cause fatigue damages. In the present study, the near wake behind a small-scale model wind turbine was investigated experimentally in a wind tunnel. The study consists of measurements with particle image velocimetry using two different inlet conditions: a freely developing boundary layer, causing an almost uniform inflow across the rotor disc, and an inflow with strong shear across the rotor disc, in order to model the atmospheric boundary layer. The results show a faster recovery of the wake in the case with shear inflow, caused by the higher turbulence levels and enhanced mixing of momentum. The increased inlet turbulence levels in this case also resulted in a faster breakdown of the tip vortices as well as different distributions of the streamwise and vertical components of the turbulence intensity in the wake. An analysis comparing vortex statistics for the two cases also showed the presence of strong tip vortices in the case with lower inlet turbulence, while the case with higher inlet turbulence developed a different distribution of vortices in the wake.
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篇名 Effects of Inflow Conditions on Wind Turbine Performance and near Wake Structure
来源期刊 流体动力学(英文) 学科 医学
关键词 Wind TURBINE Model WAKE Structure TIP VORTEX TURBULENCE Mixing Particle Image VELOCIMETRY
年,卷(期) 2017,(1) 所属期刊栏目
研究方向 页码范围 105-129
页数 25页 分类号 R73
字数 语种
DOI
五维指标
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研究主题发展历程
节点文献
Wind
TURBINE
Model
WAKE
Structure
TIP
VORTEX
TURBULENCE
Mixing
Particle
Image
VELOCIMETRY
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
流体动力学(英文)
季刊
2165-3852
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
302
总下载数(次)
0
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