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| Analysis on support mechanism of the axial film in Rotary Pressure Exchanger based on Fluent |
| ZHAO Fei, YANG Shuai, WU Jun, WU Chun-jie, WU Da-zhuan |
| Institute of Chemical Machinery, Zhejiang University,Hangzhou 310027, China |
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Abstract To research the support mechanism and stiffness of axial film in rotary pressure exchanger (RPE) which is widely employed in Sea-water Reverse Osmosis (SWRO) system, a 3-D model, which includes circumferential film, axial film and lubrication groove, was built to stimulate the pressure field in clearance based on Fluent software. It is proved that the support capacity of axial film depends on hydrostatic effect, and the circumferential film effect on support capacity of axial film cannot be ignored. The effect of circumferential film on support capacity is reflected in the influence of the average pressure of lubrication groove. The stiffness of axial film is larger when the axial clearance is smaller than the radial clearance. With the increasing of radial clearance, the stiffness of axial film declines, which is more obvious in a little clearance of axial film. The axial force of axial film has a linear relation with the inlet pressure of the RPE, and its stiffness is much larger when the inlet pressure increases.
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Published: 01 August 2014
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基于Fluent的压力能交换器端面液膜支撑机理分析
为研究海水淡化用旋转式压力能交换器端面液膜支撑机理和刚度特性,为间隙设计提供参考,对压力能交换器内环向液膜、端面液膜和孔槽进行整体三维建模,基于Fluent对间隙内三维压力场进行定常计算.结果表明,旋转压力能交换器端面液膜支撑为静压支撑,且在讨论端面支撑原理时,环向液膜不能忽略.环向液膜对支撑力的影响体现在对端面润滑槽均压值的影响,当端面液膜间隙小于环向液膜半径间隙时,端面液膜刚度较大,随着环向液膜间隙增大,端面液膜支撑刚度下降,且在端面小间隙下尤为明显.另外发现,端面支撑力与进口压力呈线性关系,且压力越大,端面液膜支撑刚度越大.
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| ［1］ MACHARG J P. Retro-fitting existing SWRO systems with a new energy recovery device ［J］.Desalination, 2002,153（1）: 253-264.
［2］ 周一卉.旋转正位移式液体压力能传递过程理论与实验研究［D］.大连:大连理工大学.2010.
ZHOU Yi-hui. Theoretical and experimental study on fluid pressure energy transfer process based on rotary positive displacement principle［D］. Dalian: Dalian University of Technology.2010.
［3］ 周一卉,丁信伟.旋转式压力能交换器密封端面液膜压力和泄漏量的数值模拟［J］.润滑与密封.2009,34(6): 81-84.
ZHOU Yi-hui, DING Xin-wei. Numerical simulation on pressure distribution and face leakage of rotary pressure exchanger［J］. Lubrication Engineering,2009,34(6): 81-84.
［4］ 姜海峰.关于旋转式流体压力能交换器的数值模拟研究［D］.大连:大连理工大学.2008.
JIANG Hai-feng. Numerical simulation of rotary fluid pressure energy exchanger ［D］.Dalian: Dalian University of Technology. 2008.
［5］ ELESHAKY M E, CFD investigation of pressure depressions in aerostatic circular thrust bearings ［J］. Tribology International, 2009, 42: 1108-1117.
［6］ 王和顺,董霖,黄泽沛,等.静压干气密封端面流场数值模拟［J］.排灌机械工程学报.2011, 29(2): 165-169.
WANG He-shun, DONG Lin, HUANG Ze-pei, et al. Numerical simulation on flow field of aerostatic dry gas seal ［J］. Journal of Drainage and Irrigation Machinery Engineering. 2011,29(2): 165-169.
［7］ 钟一谔,何衍宗,王正,等.转子动力学［M］,北京：清华大学出版社,1987.
［8］ 孙昂,马文琦,王祖温. 环面节流平面气浮轴承大间隙下流场数值模拟［J］.润滑与密封.2007,32(9): 16-19.
SUN Ang, MA Wen-qi, WANG Zu-wen. Numerical simulation of externally pressure circular thrust gas lubrication bearing under height bearing c learance ［J］. Lubrication Engineering,2007,32(9): 16-19.
［9］ 熊永强.计入空化效应的水润滑径向滑动轴承数值模拟研究［D］.上海:上海交通大学.2011.
XIONG Yong-qiang. Numerical study of the water-Lubricated journal bearing considering the effects of cavitation ［D］.Shanghai: Shanghai Jiao Tong University.2011.
［10］ 许耀铭.油膜理论与液压泵和马达的摩擦副设计［M］,北京：机械工业出版社,1987. |
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