Simulation and Research on Internal Flow Fields of Ball Valve Based on Fluent Software
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摘要: 利用FLUENT软件对球阀内部三维流场进行数值模拟仿真.探究了球阀开度由关闭到逐步增大时阀门的内部流场流动状态.分析了球阀在5个不同开度下(20%、40%、60%、80%和100%),球阀的内部流场变化情况.由此得出当阀门开度为20%～40%之间时,球阀内部流动最为复杂,产生最为强烈的涡流回旋,阀门的流阻很大,漩涡周围边界流速远大于中心流速,并且中心压力最低,直至全开时流动达到稳定.计算得出这5个不同开度下阀门前后压差,流量系数和流阻系数变化值,绘制出其三者在阀芯不同开度时的变化曲线.Abstract: Fluent is used to take numerical simulation of three dimensional flow of the inner of the ball valve. There is an exploration on the internal flow fields of the valve when the opening degree gradually increases. The change circumstances of the internal flow fields of the ball valve is analyzed on 5 different opening degrees(20%,40%,60%,80% and 100%). Simulation results show that: when the valve opening is between 20% ~ 40%,the ball valve internal flow is the most complex,the eddy current cyclotron is the most strong,the valve flow resistance is very large,swirls velocity around the boundary is much larger than the velocity at the centre,and the pressure at the center position is the lowest,until the flow reaches steadily. The differential pressure value before and after the valve,the variation values of the flow coefficient and flow resistance coefficient on 5 different opening degrees have been got,the variation curves about three of them are obtained by analysis when the valve is on different open degrees.
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Key words:
- ball valve /
- boundary conditions /
- computer simulation /
- energy dissipation /
- flow coefficient
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[1] 龚禹,桂林,徐叶松球阀阻力系数的数值模拟及流场 分析[J]水利电力科技,2010,(9):19-24 Gong Y,Gui L,Xu Y S.Numerical simulation of ball valve resistance〔oelfieient and flow field analysis[J] Water Power Technology,2010,(9):19-24(in Chinese) [2] 贺小峰,黄国勤,杨友胜球阀阀口流量特性的试验研 究[J]机械工程学报,2008,(8); 30-33 He X F,Huang G Q,Yang Y S.The experimental study on the flow charactaeristic of ball valve orifice[J].Journal of Mechanical Engineering,2008,(8):30-33(in Chinese) [3] 刘哗,朱晓林,王有撞球阀流场的数值模拟与分析[J] 吉林建筑工程学院学报,2009,(12); 29-32 Liu Y,Zhu X L,Wang Y T.Numerical simulation and analysis on the flow field of ball valve[J].Journal of Jilin Architectaure and Civil Engineering Institute,2009,(12): 29-32(in Chinese) [4] 吴民生,段文广计算流体动力学(CFD)在流体机械领 域的应用[J]装备制造技术,2008,(12); 36-37 Wu M S,DuanWG.The application of computational fluid dynamic、(CFD)in the field of the fluid machinery [J] Manufactauring Technology Equipment,2008,(12):36-37 (in Chinese) [5] 张生昌,张玉林,方志明基于CFD的球阀三维流场数 值模拟[J]排灌机械工程学报,2013,(2):157-161 Zhang S C,Zhang Y L,Fang Z M.Numerical simulation of 3D flow field of ball valve based on CFD[J].Journal of Drainage and Irrigation Machinery Engineering,2013, (2):157-161(in Chinese) [6] 赵莹,周进球阀流场的数值模拟与可视化研究[J]导 弹与航天运载技术,2007,(6); 35-39 Zhao Y,Zhou J.Numerical simulation and visualization study on the flow field of ball valve[J]Missiles and Space Vehictaes,2007,(6):35-39(in Chinese) [7] J.L莱昂斯阀门技术手册[M]北京:机械工业出版 社,1991 Lyons J L.Valve technology handbook[M]Beijing; Machinery Industry Press,1991(in Chinese) -
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