介质流向对截止阀流场和流阻特性的影响
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摘要
为探索介质流向对截止阀内部流场和流阻特性的影响,应用SOLIDWORKS软件建立截止阀的三维模型。使用Fluent软件中的有限元法和标准k-ε湍流模型,在不同开度的情况下,采用数值模拟分析的方法,研究不同介质流向下截止阀的流场和流阻特性,分析阀体内部的速度和压力分布规律。结果表明:在两种不同的流向下,阀门的流通能力相差较小;在小开度时,介质高进低出时能够减小阀门的压力损失,在流通高压介质的情况下,高进低出的流向能够极大的减小阀门的关闭力。流场的分析为截止阀的结构设计和优化提供参考。
To explore the influence of medium flow direction on block valve flow field and flow resistance characteristics,utilize the SOLIDWORKS software to establish the three-dimensional model of block valve.Utilize the finite element method of Fluent software and standard k-εturbulence model,and under different opening degree,utilize the method of numerical simulation analysis to research the flow field and flow resistance characteristics of block valve under different flow directions,analyze the speed and pressure distribution law inside the pump.The results show that under two different flow directions,the flow capacity of valve is relative small;under the condition of small opening degree,the high-in-and-low-out of medium can reduce the pressure loss of valve,and under the condition of high pressure medium flowing,the direction of high-in-and-low-out can tremendously reduce the closing pressure of valve and the analysis of flow field can provide references for structural design and optimization.
To explore the influence of medium flow direction on block valve flow field and flow resistance characteristics,utilize the SOLIDWORKS software to establish the three-dimensional model of block valve.Utilize the finite element method of Fluent software and standard k-εturbulence model,and under different opening degree,utilize the method of numerical simulation analysis to research the flow field and flow resistance characteristics of block valve under different flow directions,analyze the speed and pressure distribution law inside the pump.The results show that under two different flow directions,the flow capacity of valve is relative small;under the condition of small opening degree,the high-in-and-low-out of medium can reduce the pressure loss of valve,and under the condition of high pressure medium flowing,the direction of high-in-and-low-out can tremendously reduce the closing pressure of valve and the analysis of flow field can provide references for structural design and optimization.
引文
[1]陆陪文.阀门设计入门与精通[M].北京:机械工业出版社,2009.
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[3]宋治伟,崔宝玲,尚照晖,等.截止阀启闭过程内部瞬态流动特性[J].工程热物理学报,2012,33(6):957-960.
[4]巴鹏,邹长星,张秀绗.基于CFD技术的截止阀启闭时流场动态模拟[J].润滑与密封,2010,35(7):80-85.
[5]巴鹏,邹长星,陈卫丹.截止阀启闭时流动特征的动态数值模拟[J].振动与冲击,2010,29(10):157-161.
[6]陈瑜,魏文鹏,张立祥,等.基于Fluent的截止阀壳内流道流场分析[J].煤矿机械,2013,34(10):90-91.
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[8]袁新明,贺国治,毛根海.用RNGk-ε紊流模型对截止阀三维紊流流动的数值模拟[J].流体机械,2006,34(2):34-38.
[9]Song X G,Wang L,Young C P.Transient Analysis of 3-D Flow Through LNG Marine ControlValves for Their Advanced Design[J].Journal of Mechanical Science and Technology,2008,22:1 998-2 005.
[10]张晓东,李俊华.基于Fluent的锥形节流阀流场数值模拟[J].石油矿场机械,2009,38(9):50-52.
[11]刘厚君,祁伟,张亮,等.低温阀门启闭密封试验研究[J].低温与超导,2007,35(2):99-102.
[2]崔宝玲,马光飞,王慧杰,等.阀芯结构对节流截止阀流阻特性和内部流动特性的影响[J].机械工程学报,2015,63(12):178-184.
[3]宋治伟,崔宝玲,尚照晖,等.截止阀启闭过程内部瞬态流动特性[J].工程热物理学报,2012,33(6):957-960.
[4]巴鹏,邹长星,张秀绗.基于CFD技术的截止阀启闭时流场动态模拟[J].润滑与密封,2010,35(7):80-85.
[5]巴鹏,邹长星,陈卫丹.截止阀启闭时流动特征的动态数值模拟[J].振动与冲击,2010,29(10):157-161.
[6]陈瑜,魏文鹏,张立祥,等.基于Fluent的截止阀壳内流道流场分析[J].煤矿机械,2013,34(10):90-91.
[7]袁新明,贺国治,陈华,等.弯型截止阀流场的PIV显示和数值模拟[J].水科学进展,2003,14(2):231-235.
[8]袁新明,贺国治,毛根海.用RNGk-ε紊流模型对截止阀三维紊流流动的数值模拟[J].流体机械,2006,34(2):34-38.
[9]Song X G,Wang L,Young C P.Transient Analysis of 3-D Flow Through LNG Marine ControlValves for Their Advanced Design[J].Journal of Mechanical Science and Technology,2008,22:1 998-2 005.
[10]张晓东,李俊华.基于Fluent的锥形节流阀流场数值模拟[J].石油矿场机械,2009,38(9):50-52.
[11]刘厚君,祁伟,张亮,等.低温阀门启闭密封试验研究[J].低温与超导,2007,35(2):99-102.