【摘要】 进行了沿岸流模型实验,测量沿岸流流速的垂向分布。采用Faria等(1996)的方法对实验结果进行了分析,将水深分为上层和下层两部分:下层采用对数分布来表达沿岸流的垂向分布;上层考虑了波浪引起的自由表面的波动,使流速分布包括了修正的对数分布和质量输移速度两部分。对实验结果得到的相对粗糙度与Sleath(1991)的经验公式结果进行了对比,也对摩阻流速结果与已有经验公式计算结果的进行了对比。更多还原

【Abstract】 The experiment was conducted to measure the vertical distributions of longshore currents.To express the velocity distribution,Faria’s method was used,and the water depth is divided into two parts:the upper layer and the lower layer.It is found from the test data that a logarithmic profile can be used for the lower layer.Due to the presence of waves,the velocity profile for the upper layer is described by using an adjusted logarithmic profile plus the mass transport velocity.Comparisons are made with the Visser’s data and the filed experiment DUCK94’s data to verify the results.The results of friction velocity and relative roughness,which calculate from the velocity distribution expression,are also obtained and compared with relevant calculated results.更多还原