摘要
通过理论分析研究了底坡对急流冲击波的影响,并进行了相应的模型试验研究。在陡坡渠道上,波阵面不再是直线,冲击波的角度和深度之比不是常数,而是沿波阵面缓慢变化。文中提出一种近似方法计算急流冲击波的角度和深度之比;引进一个动水压强修正系数来概括垂直冲击波波阵面方向的动量方程;由于底坡的影响,沿着激震前沿来流的佛劳德数增大,因此在每一部分都提出了确定佛劳德数的方法。计算结果与试验结果吻合良好。
The effect of the bottom slope on the rapid flow shock wave is theoretically studied with the relevant model test herein. An approximate method to calculate the shock wave angle and depth ratio of the rapid flow is suggested, and then a correction coefficient of the hydrodynamic pressure to generalize the momentum equation in the direction perpendicular to the shock front is introduced as well. Due to the influence of the bottom slope, the Froude number is increased along the coming flow of the shock front , so a method to determine the Froude number at each element is proposed. The calculated results are in good agreement with those obtained in the test.
出处
《水利水电技术》
CSCD
北大核心
2005年第10期23-26,共4页
Water Resources and Hydropower Engineering
关键词
急流冲击波
理论分析
模型试验
陡坡渠道
rapid flow shock wave
theory analysis
model test
sloping channel
