Quantifying turbulence for tidal power applications
Quantifying turbulence for tidal power applications
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量化潮汐发电应用中的湍流
DOI：
10.1109/oceans.2010.5664600
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
V. Durgesh
中科院分区：
文献类型：
--
作者：
J. Thomson;B. Polagye;M. Richmond;V. Durgesh
利用从华盛顿州普吉特湾潮汐发电站新收集的数据，对湍流定量的度量进行了评估和讨论。特别令人感兴趣的是“湍流强度”的稳健性，它被定义为速度标准偏差与速度平均值的比率。同时，利用声学多普勒测速仪(ADV)的原始数据对用于湍流研究的原始PING声学多普勒海流剖面仪(ADCP)数据的质量进行了评估。从原始PING数据中去除多普勒噪声是湍流量化的关键步骤。剔除落潮周期，海床以上4.6m高度的修正湍流强度估计分别为ADCP和ADV的10%和11%。对湍流耗散率的估计变化较大，从10-3到10-1W/m~3。给出了相干湍流动能(TKE)的算例分析。
Using newly collected data from a tidal power site in Puget Sound, WA, metrics for turbulence quantification are assessed and discussed. Of particular interest is the robustness of the “turbulent intensity,” defined as the ratio of velocity standard deviation to velocity mean. Simultaneously, the quality of raw ping Acoustic Doppler Current Profiler (ADCP) data for turbulence studies is evaluated against Acoustic Doppler Velocimeter (ADV) data at a point. Removal of Doppler noise from the raw ping data is shown to be a crucial step in turbulence quantification. Excluding periods of slack tide, the corrected turbulent intensity estimates at a height of 4.6 m above the seabed are 10% and 11% from the ADCP and ADV, respectively. Estimates of the turbulent dissipation rate are more variable, from 10-3 to 10-1 W/m3. An example analysis of coherent Turbulent Kinetic Energy (TKE) is presented.