摘要
以航空发动机前支承轴承腔为模型,采用CFX软件计算了若干工况条件和轴承腔结构下的气相介质切向速度,并获得气相介质切向速度的拟合公式;建立了单个油滴在气相介质阻力和重力影响下的运动方程,采用数值求解的方法实现了油滴运动的计算,在此基础上完成了油滴沉积特性的分析,并探讨了转子转速和油滴直径对油滴运动和沉积的影响。油滴沉积率及动量转移率的计算,是开展油膜厚度和速度计算的基础,继而为轴承腔换热分析提供初始条件。
It is based on the structure of beaving chamber befor compressor, using CFX to caculate tangential velocity of the gas phase medium under several working conditions and structure of bearing chamber, obtaining the fitting formula of the gas phase medium, establishing the equation of motion of a single droplet under the influence of the gas phase medium resistance and gravity, based on the numerical solution method to solve the droplet motion equation, and the studies analyses the chavacteristcs of droplets deposition; then discusses the influence of the rotor rotational speed and oil droplet diameter on droplets movemont and depositian. The calcution of droplets deposition efficiency and the momentum transfer effwiency is the foundation of caculating the thickness and speed of oil film, which would provide initial conditions for the heat analysis in bearing chamber.
出处
《机械设计与制造》
北大核心
2014年第6期171-174,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51275411)
关键词
轴承腔
油滴轨迹
沉积率
动量转移率
：Bearing Chamber
Droplet Speed
Deposition Efficiency
Momentum Transfer Efficiency
