渐扩式折坡消力池的水力特性试验研究

以出山店水库枢纽工程南灌溉洞为例，针对原设计方案折坡等宽式消力池中存在水跃不稳定、流速分布不均及消能率低的问题，提出了完全渐扩式折坡消力池的修改方案，并通过物理模型试验研究了两种不同消力池方案的水力特性。结果表明，修改方案能增大消力池进口的弗劳德数，可明显改善原方案中流态流速分布不均、水跃不稳定问题，且能较大地提高消能率。

Experimental Study on Hydraulic Characteristics of Gradually Broadened Stilling Basin with Slope

Taking the south irrigation tunnel of Chushandian reservoir control project for an example, aiming at the problem of unstable hydraulic jump, uneven velocity and low energy dissipation rate in the original design, this paper proposes the amendment plan of stilling basin with slope in complete gradual-spread type. Through the physical model test, it researched two kinds of different schemes of hydraulic characteristics of stilling basin. The experiment results show that the modified plan can increase the Froude Number of stilling basin intake, which obviously improves the problem of uneven velocity and unstable hydraulic jump and can significantly enhance the energy dissipation ratio.