超临界二氧化碳动压轴承紊流润滑模式研究  

Study on Turbulent Lubrication Mode of Supercritical Carbon Dioxide Hydrodynamic Bearing

作　　者：易书翔 王小静[1] 陈胜[1] 朱丽明 

机构地区：[1]上海大学机电工程与自动化学院,上海200444

出　　处：《工业控制计算机》2023年第8期88-90,93,共4页Industrial Control Computer

基　　金：国家自然科学基金(52075311)资助。

摘　　要：高速、大功率的机组工况条件使得超临界二氧化碳(S-CO_(2))轴承工作在紊流润滑状态。以S-CO_(2)动压轴承为研究对象,基于Fluent软件建立轴承气膜仿真分析模型,采用广泛使用的两方程standard k-ε紊流模型,分析不同轴承偏心对气膜压力和承载力的影响,同时用经典的Ng-Pan紊流润滑模式进行计算对比。研究结果表明,两种紊流模式下S-CO_(2)轴承的压力分布在正压区更为吻合,并在此基础上分析了standard k-ε紊流模型下实际气体效应对轴承特性的影响。The high speed and high power unit conditions make the supercritical carbon dioxide(S-CO_(2))bearings work in turbulent lubrication.In this paper,the S-CO_(2) hydrodynamic bearing is used as the research object,and a simulation analysis model of the bearing gas film is established based on Fluent software.The widely used two-equation standard k-εturbulent flow model is used to analyze the effect of different bearing eccentricities on the gas film pressure and load capacity,and the classical Ng-Pan turbulent flow lubrication mode is also used for calculation and comparison.The results show that the pressure distribution of the S-CO_(2) bearing under the two turbulent flow models is more consistent in the positive pressure region,and the influence of the real gas effect on the bearing characteristics under the standard k-εturbulent flow model is analyzed on this basis.

关 键 词：超临界二氧化碳 紊流润滑 实际气体效应 静态特性 

分 类 号：TH133.3[机械工程—机械制造及自动化] TH117.2