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.
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。
关键词
超临界二氧化碳
紊流润滑
实际气体效应
静态特性
supercritical carbon dioxide
turbulent lubrication
real gas effect
static characteristics
