摘要
为了分析拍门在启动过程中的运动状态和水力特性,以轴流泵机组的上翻式拍门为研究对象,应用Realizable k-ε湍流模型,通过用户自定义函数(UDF)对机组做设定,使用动网格中的光顺法和重构法,并结合6DOF算法,模拟出上翻式拍门的开启过程。研究结果表明:上翻式拍门在机组开启时,因为受到合力作用短暂闭合,随后被水流冲开,拍门开启速度先快后慢并趋于稳定。拍门快速开启过程为0.021~0.654 s,拍门最大开度为23.76°,机组稳定后的拍门开度维持在20.36°;在拍门开启的一瞬间,其所受的力矩和前后的水力损失较大,随后会随着开度的增加而减少并趋于稳定,该研究过程平均拍门所受力矩为11746.17 N·m,平均拍门前后水力损失为0.20 m,平均拍门前后水力损失系数为1.43。
In order to analyze the motion state and hydraulic characteristics of the upturning flap valve during the start-up process,taking the upturning flap valve of the axial-flow pump unit as the research object,the Realizable k-εturbulence model is applied,and the unit is de⁃signed by the user-defined function(UDF)by using the smoothing method and reconstruction method in the moving grid,combined with the 6DOF algorithm,to simulate the opening process of the upturning flap valve.The research results show that during the startup of the unit,the upturning flap valve will be closed for a short time due to the combined force,and then it will be flushed open by the water flow.The opening speed of the flap valve is fast at first and then slow and tends to be stable.The rapid opening process of the flap valve in this study is 0.021~0.654 s,the maximum flap valve opening is 23.76°,and the flap valve opening degree after the unit stabilizes is maintained at 20.36°.At the moment when the flap valve is opened,the moment and the hydraulic loss before and after the flap valve are relatively large,and then de⁃crease with the increase in the opening degree and tend to be stable.The average flapping moment in the research process is 11746.17 N·m.The average hydraulic loss before and after the flap valve is 0.20 m,and the average hydraulic loss coefficient before and after the valve is 1.43.
作者
游峻松
周大庆
郭俊勋
王胤淞
YOU Jun-song;ZHOU Da-qing;GUO Jun-xun;WANG Yin-song(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210009,Jiangsu Province,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China)
出处
《中国农村水利水电》
北大核心
2022年第11期91-96,共6页
China Rural Water and Hydropower
关键词
上翻式拍门
拍门开启过程
6DOF
水力特性
数值模拟
upturning flap valve
flap valve opening process
6DOF
hydraulic characteristics
numerical simulation
作者简介
游峻松(1998-),男,硕士研究生,主要从事水力机械及系统过渡过程、泵站水力学等研究。E-mail:youjs98@163.com;通讯作者:周大庆(1976-),男,教授,博士,主要从事水力机械及系统过渡过程、泵站水力学等研究。E-mail:zhoudaqing@hhu.edu.cn。
