Experimental database of the flow past a wall-mounted square cube

in high flow velocity areas like those suitable for tidal applications, turbulence intensity is high and flow variations may have a major impact on tidal turbines behaviour. large turbulent structures are present in the water column and may interact with the tidal turbine. the reynolds number, based on the rugosity height and mean flow velocity, is rather high in this context: re=2.5x107. for that purpose, experiments are carried out in a flume tank with re as high as achievable in froude similitude (in the tank: re=2.5x105 and fr=0.23) in order to study the wake past seabed obstacles. the obstacle is here a canonical square wall-mounted cube chosen to be representative of specific in-situ bathymetric variations. to represent the variability of turbulent in-situ conditions, different upstream turbulence rate are achieved. using piv and ldv measurements, the flow past the cube is investigated. the experimental database is presented in this report.

在高速流区域，如适用于潮汐应用的区域，湍流强度较高，流量变化可能对潮汐涡轮机的行为产生重大影响。水柱中存在大型湍流结构，可能与潮汐涡轮机相互作用。基于粗糙度高度和平均流速计算出的雷诺数在此情况下相对较高：Re=2.5x10^7。为此，在弗劳德相似性（在罐中：Re=2.5x10^5和Fr=0.23）下，通过水槽实验以实现尽可能高的雷诺数，以研究海底障碍物后的尾流。在此，障碍物是一个具有代表性的典型正方形壁挂立方体，其选择旨在反映特定的现场水深变化。为了表征现场湍流条件的变异性，实现了不同的上游湍流速率。通过PIV和LDV测量，对立方体附近的流动进行了研究。本报告展示了实验数据库。