泄水陡坡后消力池的水跃特性数值模拟

水跃消能是水利工程中经常采用的消能形式,国内外许多学者对水跃进行了大量的研究。在工程实践中发现,泄水陡坡后消力池内水跃的水力特征值与规范方法计算得到的值有较大差异。通过对不同坡度的陡坡后消力池内水跃特性进行数值模拟,结合室内模型试验,分析了陡坡消力池内陡坡坡度与水跃长度的关系,并对比了数值模拟所得的水跃长度值与经验公式及模型试验结果。研究结果表明,数值模拟结果与实测值相对误差较小,经验公式的计算结果误差较大。因此,在今后实际工程设计中,可通过数值模拟的方法对陡坡后消力池长度进行初设。

Numerical Simulation of Hydraulic Jump in the Stilling Pool of the Sluicing Steep Slope

Hydraulic jump energy dissipation is often used in the water conservancy projects, and a lot of research has been conducted on the hydraulic jump by many domestic and foreign scholars. For the engineering practice, the characteristic values of hydraulic jump measured in the stilling pool of the sluicing steep slope differ significantly with those obtained from the standard method formula. In this paper, numerical simulations are performed to characterize the hydraulic jump in the stilling pool of the steep slope under different slopes, and the relationship between the length of hydraulic jump and the slope of stilling pool is analyzed based on the numerical simulations and indoor model tests. The lengths of hydraulic jump determined by the numerical simulations are compared with those obtained from the empirical formula and model tests. The results show that the relative errors of hydraulic jump are small between the numerical simulation results and measured values, while the relative errors are large between the numerical simulation results and calculated values from empirical formula. In the practical engineering design, the method of numerical simulation can be used in the preliminary design of stilling pool length.