考虑扩散比影响的突扩水跃共轭水深计算研究

Research on conjugate water depth calculation of hydraulic jump with abrupt expansion under considering the influence of diffusion ratios

目前对突扩水跃消能中的跃后水深的理论研究还尚不成熟。根据已有文献的实验资料,对突扩式水跃回流区平均水深做出了假设,运用动量定理推导了计算突扩水跃共轭水深的理论方程,用实验资料确定了有关参数,得到了较高的精度计算方程,并利用实验资料与已有的几种共轭水深方程进行了比较。结果表明:新方程计算的跃后水深与实际更加相符。

The theoretical study of the water depth after its jump is not yet mature and perfect. According to the experimental data of the existing literatures,the assumptions on the average water depth in the backflow zone in the abrupt-expanding hydraulic jump are made in this paper. The theoretical equations for calculating the conjugate water depth of the hydraulic jump with abrupt expansion are deduced by the momentum theorem and determines the relevant parameters by using experimental data. The calculation equation with high accuracy are obtained. Comparing the results of several existing conjugate water depth equations with the experimental results,it shows that the equation in this paper has higher accuracy and the calculated water depth after the jump is more in line with the actual situation.