Milne I A, Sharma R N, Flay R G J
Centre for Offshore Foundation Systems, The University of Western Australia, Crawley 6009, Australia.
Department of Mechanical Engineering, The University of Auckland, Auckland 1010, New Zealand.
Proc Math Phys Eng Sci. 2017 Aug;473(2204):20170295. doi: 10.1098/rspa.2017.0295. Epub 2017 Aug 23.
The structure of turbulence in a rapid tidal flow is characterized through new observations of fundamental statistical properties at a site in the UK which has a simple geometry and sedate surface wave action. The mean flow at the Sound of Islay exceeded 2.5 m s and the turbulent boundary layer occupied the majority of the water column, with an approximately logarithmic mean velocity profile identifiable close to the seabed. The anisotropic ratios, spectral scales and higher-order statistics of the turbulence generally agree well with values reported for two-dimensional open channels in the laboratory and other tidal channels, therefore providing further support for the application of universal models. The results of the study can assist in developing numerical models of turbulence in rapid tidal flows such as those proposed for tidal energy generation.
通过对英国一个具有简单几何形状和平静表面波作用的地点的基本统计特性进行新的观测，对急潮流中湍流的结构进行了表征。艾莱海峡的平均流速超过2.5米/秒，湍流边界层占据了大部分水柱，在靠近海床处可识别出近似对数平均速度剖面。湍流的各向异性比率、频谱尺度和高阶统计量通常与实验室二维明渠和其他潮汐通道报告的值非常吻合，因此为通用模型的应用提供了进一步支持。该研究结果有助于开发急潮流中湍流的数值模型，例如为潮汐能发电提出的模型。
