三角形鼻坎挑流水舌出射角的试验研究

发布时间：2018-02-12 22:33

本文关键词： 三角形鼻坎上缘出射角下缘出射角横向脉动流速平均水深　出处：《水电能源科学》2017年04期 　论文类型：期刊论文

【摘要】：挑流消能是水电工程建设中广泛采用的一种消能方式,挑流水舌上缘和下缘轨迹决定大坝下游的冲刷位置和范围,而上缘和下缘出射角决定水舌的轨迹,因此出射角的研究至关重要。基于三角形鼻坎挑流的物理模型试验结果,研究挑流水舌起挑断面横向脉动流速和平均水深对水舌出射角的影响。采用平均误差最小的分析方法,分别确定脉动流速和平均水深对出射角影响的权重系数,并提出水舌上缘和下缘出射角的计算方法。相比试验实测值,所提方法计算所得挑距的误差在5%以内,具有较高精度。
[Abstract]:Energy dissipation is a widely used energy dissipation method in hydropower construction. The trajectory of income's upper and lower edge determines the location and range of the downstream scour of the dam, and the angle of the upper and lower edge of the dam determines the trajectory of the water tongue. Based on the results of the physical model test of triangular nose ridges, the effects of the transverse pulsating velocity and the average water depth on the ejection angle of the tongue of income are studied. The analysis method with minimum average error is used. The weight coefficients of the influence of pulsating velocity and average water depth on the ejection angle are determined, and the calculation method of the ejection angle of the upper and lower edge of the water tongue is put forward. Compared with the experimental data, the error of the proposed method is less than 5%, which has a higher accuracy.
【作者单位】：山西大学动力工程系;
【基金】：山西大学第十四期本科生科研训练项目(2016014376)
【分类号】：TV653

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