Turbulent current measurements in a wind-wave tank
Turbulent current measurements in a wind-wave tank
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风波池中的湍流测量
DOI：
10.1029/jc089ic01p00627
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发表时间：
1984
影响因子：
--
通讯作者：
M. Gad
中科院分区：
文献类型：
--
作者：
Jung;M. Gad
在风浪水槽中进行了室内实验，研究了风浪在空气和波浪边界层中产生的湍流特性。用两个热线探针测量了水面湍流空气边界层。人们发现它很好地模拟了水体上方的大气边界层。用电容探头记录波高。计算了风浪的谱、相速度、主波长和主频率等统计量。采用10个交叉元件热膜探针阵列测量了水面以下的水边界层，以测量速度的流向和垂直分量。各种湍流统计，包括平均速度，均方根速度波动，雷诺应力，耗散率，光谱，和高阶统计进行了计算。相似的配置文件被发现的平均次表层电流和均方根湍流波动在流向和垂直方向。速度谱反映了波浪运动的相对重要性，随深度呈指数衰减。
Laboratory experiments were conducted in a wind-wave tank to study the turbulence characteristics in the air and wave boundary layers generated by wind and waves. The turbulent air boundary layer over the water surface was surveyed using two hot-wire probes. It was found to be a good simulation of an atmospheric boundary layer over a body of water. Capacitance probes were used to record the wave height. Spectra, wave phase velocity, dominant wavelength and frequency, and other statistics of the wind waves were computed. The water boundary layer below the water surface was surveyed using an array of 10 cross-element hot-film probes to measure the stream wise and vertical components of velocity. Various turbulence statistics including mean velocity, root-mean-square velocity fluctuations, Reynolds stress, dissipation rate, spectra, and higher-order statistics were computed. Similarity profiles were found for the mean subsurface current and the rms turbulent fluctuations in the streamwise and vertical directions. The velocity spectra indicated the relative importance of the wave-induced motion, which attenuated ex-pontentially with depth.