把基于流体动力学(CFD)软件Fluent的三维数值模拟作为工具,采用控制变量法,以较低的能量损耗和较大的气体体积分数为目标,优化了自主设计的液压油在线除气元件的结构参数,并进行了可视化试验。在模拟过程中,选择RNG k-ε 模型作为湍流模型,以代数滑移混合(Mixture)模型作为多相流模型。通过对模拟结果的深入分析,阐明了径向和轴向压力梯度在两相分离中的作用,揭示了除气元件工作的原理。
Abstract
The three dimensional numerical simulation based on the CFD software Fluent is used as a tool. In this paper, the structure parameters of an on-line bubble elimination valve for hydraulic oil are optimized using the control variable method, and the visual test is carried out. The optimization goal is a larger volume fraction of gas. At the same time, the energy loss is lower. The RNG k-ε model is used for turbulence closure and the mixture model is used for the two-phase flow. Analysis of the simulation results clarifies the role of the radial and axial pressure gradient in the gas-fluid separation, and presents the principle of the bubble elimination valve.
关键词
除气元件 ;
数值模拟 ;
优化设计 ;
两相流
{{custom_keyword}} ;
Key words
bubble elimination valve ;
numerical simulation ;
optimized design ;
two phase flow
{{custom_keyword}} ;
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 李流远.油液含气量对液压系统的影响[J].液压与气动,2001,(1):27-28.
[2] A.Abouel-Kasem,F.A.Alturki,S.M.Ahmed.Fractal Analysis of Cavitation Eroded Surface in Dilute Emulsions[J].Journal of Tribology,2011,133(4):1-9.
[3] J.M.Hobs,D.McCloy.Cavitation Erosion in Oil Hydraulic Equipment[J].Metals and Matericals, 1972,38(1):27-35.
[4] 冯斌,龚国芳,杨华勇.液压油弹性模量提高方法与试验[J].农业机械学报,2010,41(3):219-222.
[5] R.Suzuki,Y.Tanaka,S.Yokota,Downsizing of Oil Reservoir by Bubble Eliminator [C].Proceedings of the 6th JFPS International Symposium on Fluid Power,Tsukuba,2005:7-10.
[6] 邹俊,王陈向,傅新.液压油在线除气装置设计与试验[J].液压气动与密封,2012,(8):53-55.
[7] 金向红,金有海,王建军,王振波.气液旋流分离技术应用的研究进展[J].化工机械,2007,34(6):351-355.
[8] 王福军.计算流体动力学分析[M].北京:清华大学出版社,2004:2-3.
[9] Yakhot and SA Orszag, Renormalization Group Analysis of Turbulence I. Basic theory[J]. J. Sci. Comput. 1986, 1(3): 3-51.
[10] C W. Hirt and B. D. Nichols, Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries[J]. J. Comput. Phys. 1981,39(6):201-225.
[11] A.S.Tucker,C.A.Ward.Critical State of Bubble in Liquidgas Solutions[J].Journal of Applied Physics,1975,46(11):4801-4808.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(891 KB)
