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折坡水跃的水力计算是设计折坡水跃消力池时经常遇到的问题。为了得到计算 B型和 D型水跃第二共轭水深的简便有效的计算关系式 ,应用 Microsoft Excel 97和 Visual C++5 .0等软件 ,对坡度从 0 .0 5∶ 1到 0 .3∶ 1的 B型和 D型水跃试验数据进行了分析和研究。指出 B型水跃的第二共轭水深 Tw 与收缩断面水深 D1 、收缩断面佛氏数 F1 、坡角θ、水跃在斜坡上的长度 Ls 及 A型水跃的共轭水深 D2 有关 ,D型水跃的第二共轭水深 Tw 与收缩断面水深 D1 收缩断面佛氏数 F1 、坡角 θ有关。其中 ,在一定的坡角 θ下 ,B型水跃 ( Tw-D2 ) /D1 与 ( Ls/D1 ) 1 .1成正比 ,D型水跃Tw/D1 与 ( 0 .5 F21 + 1) 0 .3 5成正比。并进一步提出计算 B型和 D型水跃第二共轭水深的经验公式。
The hydraulic calculation of the collapsed water jump is a problem often encountered in the design of the collapsed water dive tank. In order to get a simple and efficient calculation of the second conjugate water depth for Type B and Type D water jets, we applied software such as Microsoft Excel 97 and Visual C ++ 5.0 with a gradient of 0. 3: 1 B-type and D-type hydrodynamic test data were analyzed and studied. It is pointed out that the second conjugate water depth Tw of type B is related to the water depth D1 of the shrinkage section, F1 of the convergent section, the slope angle θ, the length Ls of the water jump on the slope and the conjugate water depth D2 of the A type water jump. The second conjugate water depth Tw of the hydrostatic type is related to the Forschler number F1 and the slope angle θ of the shrinkage section depth D1. Among them, at a certain slope angle θ, the B-type water jump (Tw-D2) / D1 is proportional to (Ls / D1) 1 .1, and the D-type water jump Tw / D1 and (0 .5 F21 + 1) 0 .3 5 is proportional. Furthermore, an empirical formula for calculating the second conjugate water depth of type B and D is proposed.