二维贴壁射流冲刷试验成果分析

Analysis of local scour caused by a two dimensional wall jet

局部冲刷是个很复杂的问题，曾有不少学者对其进行过试验研究，但目前仍不能从理论上准确地阐明这个现象．由于几乎所有的试验都使用了粗沙，其成果在应用上有较大的局限性．作者进行了６６组水槽试验，包括中径０．０３ｍｍ的较细沙．本文用量纲分析的方法，对试验成果进行了分析，所得到的参数Ｕ、Ｂ和Ｇ能够较好地表达本研究的成果和他人的成果．

Local scour is a complicated problem. Although the experiments have been conducted by numerous scholars, it is unable to explain the phenomenon precisely yet. Since coarse sediment was used in almost all the experiments, the application of the results obtained is limited. The authors conducted 66 sets of experiments in a flume with the bed materials of fine sediment ( D =0.03 mm). Measurements were analyzed using dimensional approach. Parameters ( U, B and G )obtained can well express the results of this study as well as other's.