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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Field measurement study of wind characteristics at different measuring positions in a mountainous valley
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Field measurement study of wind characteristics at different measuring positions in a mountainous valley

机译：山谷不同测量位置风特征的现场测量研究

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摘要

The characteristics of wind in mountain valleys are complex; in this paper, we present a comprehensive analysis of these characteristics using data obtained from two wind masts located at hillside and at the bottom of a canyon. In view of the limited literature focusing on the effect of the location of measurement on the characteristics of wind in mountain valleys, we present a comparison of these characteristics in this paper. The wind characteristics investigated in this study include the mean wind speed, mean wind direction, turbulence intensity, gust factor, wind power spectra, and vertical coherence. The results indicate that the mean wind speed, turbulence intensity, and wind power spectra cannot be predicted accurately using specifications or standards. The mean wind direction at a high wind speed is always along the canyon. A modified exponential coherence model can depict the vertical coherence effectively. Furthermore, wind characteristics are to some extent affected by the variations in height and locations of measurement, but still valuable for engineering practice, and a 30-m wind mast can meet the needs instead of a 50-m one.
机译：山谷中风的特点是复杂的;在本文中，我们使用从位于山坡和峡谷底部的两个风桅杆获得的数据综合分析了这些特征。鉴于有限的文献专注于测量位置对山谷风中的风的特点的影响，我们在本文中表现了这些特征的比较。本研究中研究的风特性包括平均风速，平均风向，湍流强度，阵风，风力谱和垂直一致性。结果表明，使用规格或标准可以准确地预测平均风速，湍流强度和风电谱。高风速的平均风向始终沿着峡谷。修改的指数相干模型可以有效地描绘垂直相干性。此外，风特征在一定程度上受到测量高度和位置变化的影响，但对工程实践仍然有价值，并且30米的风桅杆可以满足需求而不是50米。

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