For a traditional stepped spillway, low energy dissipation and cavitation damage may occur when the unit discharge is larger than a limit due to reduced air entrainment in the flow. In the present work, a new type of stepped spillway called hydraulic-jump-stepped spillway (HJSS) was developed, and the air was efficiently entrained into the flow by means of a hydraulic jump in the aeration basin, which was an aeration element of this stepped spillway. Compared with the traditional stepped spillway, various aspects of the hydraulic performance of the HJSS were experimentally investigated, including the flow pattern, energy dissipation, air entrainment characteristics and time-averaged pressure. Physical model results demonstrated that the HJSS achieved a higher energy dissipation, a more favorable air entrainment performance, and a more reasonable pressure distribution. The HJSS successfully increased the unit discharge from 50–60m²/s for a traditional stepped spillway to 101.47 m²/s.

对于传统的阶梯式溢洪道，当单位流量大于限制时，由于流动中夹带的空气减少，可能会出现低能量耗散和气蚀损坏。在目前的工作中，开发了一种新型的阶梯式溢洪道，称为液压跃升式溢洪道（HJSS），通过曝气池中的液压跃升有效地将空气带入流中，这是曝气池的曝气元件。这个阶梯式溢洪道。与传统的阶梯式溢洪道相比，HJSS 的水力性能的各个方面进行了实验研究，包括流型、能量耗散、空气夹带特性和时均压力。物理模型结果表明，HJSS 实现了更高的能量耗散，更有利的加气性能，以及更合理的压力分布。HJSS成功地将单位流量从50-60m增加² /s 对于传统的阶梯式溢洪道至 101.47 m ² /s。