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为提供轴承腔油膜流动状态分析所需基础参数,提出考虑温度条件的轴承腔油滴碰撞腔壁沉积特性分析模型.梳理油滴碰撞腔壁沉积准则,在考虑油滴温度变化的条件下,确定不同碰撞现象时油滴碰撞腔壁沉积质量和动量特性.以油滴碰撞腔壁时对腔壁的冷却效率为基础,借助热量守恒条件推导油滴碰撞腔壁的沉积热量特性.讨论温度效应、转子转速、油滴直径以及进气温度等参数对油滴碰撞腔壁沉积特性的影响.计算结果表明:考虑油滴在腔内运动温度效应后,油滴碰撞腔壁的质量沉积率和动量沉积率均略有降低;转子转速以及油滴直径增加后,油滴碰撞腔壁的质量、动量和热量沉积率均有所降低;随着进气温度的增加,油滴的热量沉积率增加.
In order to provide basic parameters for oil film flow analysis in bearing cavity, a model for analysis of depositional characteristics of cavity wall of oil-droplet bearing chamber considering temperature is put forward.Combining the deposition rule of oil droplet collision cavity wall, taking into account the variation of oil droplet temperature, Based on the cooling efficiency of the cavity wall when the oil drop collides with the cavity wall, the deposition calorific property of the collision wall of the oil drop is deduced by the condition of the conservation of heat.The effects of temperature, Rotor speed, oil droplet diameter and inlet air temperature on the depositional characteristics of oil droplet collision cavity wall.The calculated results show that, after considering the temperature effect of oil droplet movement, the mass deposition rate and momentum deposition The rates of mass, momentum and heat deposition of the droplet collisions decreased after rotor speed and oil droplet diameter increased. The heat deposition rate of oil droplets increased with the increase of inlet temperature.