【摘要】 采用RNGk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。更多还原

【Abstract】 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-ε 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 on both sides of the hump is quite different after the siphon failure.更多还原