关键词: 泄洪洞, 全过程水力学问题, 模型试验, 原型观测, 大岗山水电站,

Abstract: The bank flood discharge tunnel of Dagangshan Hydropower Station has the characteristics of high head and high velocity of flow, and the hydraulics problem is prominent. In this paper, a series of optimization experiments were carried out on the aeration facilities and outlet shape of the flood discharge tunnel, and the key hydraulics problems in the whole operation process of the flood discharge tunnel were expounded by analyzing and comparing the hydraulic design, hydraulic model test and hydraulic prototype observation results. The results showed that the minimum aeration concentration control value of the model test could be reduced according to the engineering practice, and the early design and scientific research should pay more attention to the flexibility and safety of the small flow discharge. The relevant results can support the safe and reasonable operation of flood discharge tunnel and provide reliable and valuable information for the construction and operation of similar projects.

Key words: flood discharge tunnel, hydraulic problems in whole operation process, model test, prototype observation, Dagangshan Hydropower Station,