CFX和Fluent在径向滑动轴承润滑计算中的异同探讨  

Discussion on similarities and differences between CFX and Fluent software in calculating journal bearing lubrication

作　　者：孟凡明[1] 陈原培[1] 杨涛[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第1期7-14,28,共9页Journal of Chongqing University

基　　金：国家自然科学基金项目(50975297);教育部新世纪优秀人才项目(NCET-10-0881);重庆大学中央高校基本业务费重点项目(CDJZR10285501);教育部留学回国人员科研启动基金资助项目(教外司留[2011]1568)

摘　　要：基于CFD(计算流体动力学)理论,以径向滑动轴承润滑性能计算为例,分析了ANSYS中CFD模块CFX与Fluent在轴承润滑计算结果的异同。为此,建立了润滑计算模型,并采用两种模块对比分析了不同偏心率、转速及长径比工况下滑动轴承的摩擦学性能。结果表明:两种模块轴承润滑性能计算结果总体趋势基本吻合,但相对Fluent,CFX计算得到较小的最大油膜压力、轴承承载力和较大的摩擦系数;两种模块在大偏心率、小转速及小长径比工况下的计算结果偏差较大。The calculation of journal bearing＇s periormances is taken as an example, and slmllamtles and differences between the modules CFX and Fluent of ANSYS are analyzed using the CFD （computational fluid dynamics） theory. To this end, the calculation models are established and solved using the above modules. And the tribological parameters of the journal bearing are comparatively analyzed at different eccentricity ratios,rotational speeds and the ratios of bearing＇s length-diameter. The conclusion reached is that results from two modules have similar overall variation tendency in the bearing performances. However, the maximum pressure and load-carrying capacity by CFX are smaller, while the friction coefficient is greater,compared with those by Fluent. And greater deviations appear at high eccentricity, low rotational speed,or low ratio of bearing＇s length-diameter.

关 键 词：轴承 润滑 摩擦学 CFX FLUENT 异同 

分 类 号：TH133.31[机械工程—机械制造及自动化]