Flows in discharge and energy dissipation buildings generally carry a considerable amount of energy. Therefore, it is important to optimize the discharge and energy dissipation to eliminate the redundant energy as much as possible for the safety of the hydro-junction project and the downstream area. In this paper, a smoothed particle hydrodynamics (SPH) model is applied to optimize the discharge and energy dissipation related to hydraulic jumps for a large-scale real hydro-junction project. The capability of the model in resolving hydraulic jumps is validated by comparing the model results with experimental data. Then, the model is applied to optimize the real hydro-junction project, which requires a sizeable computational effort. The optimization is based on comparisons of the velocity field, the location of the jump toe and the energy dissipation rate between two different schemes for the stilling basin. It is found that the two-stage stilling basin is more effective for energy dissipation than the one-stage stilling basin with the same length. Therefore, two-stage energy dissipation should be adopted for discharge and energy dissipation buildings for similar hydro-junction projects.

排放建筑物和耗能建筑物中的流量通常会携带大量能量。因此，重要的是优化排放和能量耗散，以尽可能地消除多余的能量，以确保水电枢纽工程和下游地区的安全。在本文中，使用了平滑粒子流体动力学（SPH）模型来优化与大型实际水力枢纽工程有关的水力跳跃相关的排放和能量耗散。通过将模型结果与实验数据进行比较，可以验证该模型解决水力跳跃的能力。然后，该模型将用于优化实际的水力枢纽工程，这需要大量的计算工作。优化是基于速度场的比较，消静盆的两种不同方案之间跳跃脚趾的位置和能量耗散率。结果发现，两段式静水盆比相同长度的一段式静水盆更有效地消能。因此，对于类似的水电枢纽工程，排，耗能建筑物应采用两级耗能。