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根据已有文献对波浪形消力池流速、边界层厚度、壁面阻力的试验成果,应用动量方程以及断面流速分布的对数律,推导了波浪形消力池的壁面切应力、阻力系数、共轭水深、水跃长度的计算公式。研究结果表明:波浪形消力池的壁面切应力是跃前断面水深、断面最大流速、壁面粗糙度的函数;壁面阻力系数随壁面粗糙度的增加而增加;波浪形消力池的跃后水深、水跃长度与光滑消力池相比均有较大幅度的减小。将跃后水深、水跃长度、阻力系数的计算值与已有文献中的试验成果比较,得出跃后水深的最大平均误差约为9.81%,水跃长度的平均误差约为12.64%,阻力系数计算值比实测值略小。由此可见本文计算结果与试验结果基本吻合。
According to the experimental results of flow velocity, boundary layer thickness and wall resistance of wavy trough, the equations of momentum and the law of logarithm of flow velocity are used to deduce the wall shear stress and drag coefficient of wave trough. Yard water depth, water jump length of the formula. The results show that the wall shear stress of the wave-shaped stilling pool is a function of the water depth before the jump, the maximum velocity of the section and the roughness of the wall. The wall drag coefficient increases with the increase of the wall roughness. , The length of hydraulic jump compared with the smoothing still have a significant reduction. Comparing the calculated value of water depth, length of water jump and drag coefficient with that of the existing literature, the maximum average error of the water depth after the jump is 9.81%, the average error of the water jump length is about 12.64% and the resistance The calculated value of the coefficient is slightly smaller than the measured value. This shows that the calculation results and experimental results are basically consistent.