封闭流道内射流冲沙效果的试验研究

Experimental study of erosion causedby impinging jet insideairtight system

通过某电厂用水系统吸水暗渠内减淤措施模型试验，对冲击射流在封闭系统内的冲沙减淤效果进行了研究，并对影响冲沙效果的主要控制参数进行了分析比较。结果表明，在一定的泥沙条件下，一定尺寸的封闭系统内，入射水流的动能对冲沙效果影响很大，淤沙的冲坑半径还与冲沙管管径，水流含沙量，泥沙沉速等因素有关。

Lessening deposition inside an airtight system by using impinging jet is studied by doing model experiments. Under the circumstance of this model, the energy of the impinging jet is the main parameter deciding the deposition situation inside the system. Also the main factors affecting the radius of the scouring hole are analyzed. It is found that the energy and the nozzle diameter of the impinging jet, the sediment concentration of the flow, the settling velocity of the sediment and the size of the system would influence the scouring effect of the impinging jet. This work would be of help for solving similar problems.