水电站虹吸式进水口工作过程CFD模拟

摘要

The siphon formation process (including the vacuum process) and failure process in the siphon intake of a hydropower station were simulated with an RNG k-e turbulence model and CFD software. The distribution of the pressure, velocity, and air-water interface within the siphon pipes were analyzed. The results show that: the value of the pressure is the lowest at the top of the hump during the operating process; the vacuum pumping speed is directly proportional to the fluctuation range of pressure; and the stability of water an both sides of the hump is quite different after the siphon failure.%采用RNG k-ε湍流模型和CFD软件对水电站虹吸式进水口的虹吸形成过程(含抽真空过程)和虹吸破坏过程进行数值模拟研究,分析了虹吸管道内压强、流速、水气界面的分布及其变化情况.研究结果表明:虹吸式进水口工作过程中驼峰顶部的压强值最低；抽真空速度与压力波动幅度成正比;虹吸破坏后驼峰两侧水体平稳性存在较大差异.