Boundary-layer turbulence spectra in stable conditions
Boundary-layer turbulence spectra in stable conditions
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稳定条件下的边界层湍流谱
DOI：
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发表时间：
1977
期刊：
影响因子：
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通讯作者：
S. Caughey
中科院分区：
文献类型：
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作者：
S. Caughey
本文描述了在稳定大气边界层中高达91米的高度上对水平和垂直风速以及温度波动的同步测量。功率谱和协频谱形状显示出一个低频峰值（接近布伦特 - 维萨拉频率），由于湍流，该峰值与高频处的一个峰值之间由一个频谱间隙隔开。8米处湍流子区间的频谱形状与凯马尔（1973年）先前给出的通用曲线非常吻合。文中还给出了尺度参数$f_0$随稳定性变化的更多信息，并讨论了归一化程序对较高高度频谱的适用性。
Simultaneous measurements of horizontal and vertical wind speeds and temperature fluctuations at heights up to 91 m in the stable atmospheric boundary layer are described. The power and cospectral shapes show a low-frequency peak (near the Brunt-Väisälä frequency) separated by a spectral gap from a peak at high frequency due to turbulence. Spectral shapes in the turbulence subrange at 8 m are in good agreement with the universal curves previously presented by Kaimal (1973). Further information is given on the variation of the scaling parameter, f0, with stability; and the applicability of the normalising procedure to the spectra from the higher levels is discussed.