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。 Taking the South Irrigation Cave in the Izushide Reservoir Dam Project as an example, aiming at the problem of instability of water jets, uneven distribution of flow velocity and low energy dissipation rate in the original design, The modification plan of the stilling pool, and the hydraulic characteristics of two different stilling pool schemes by physical model test. The results show that the modified scheme can increase the Froude number of the inlet of the stilling pool, which can obviously improve the problem of uneven flow velocity distribution and unstable water jets in the original scheme, and can greatly improve the energy dissipation rate.