轴承腔内油气两相流动与换热的数值模拟  

Numerical Simulation of Air-oil Two Phase Flow and Heat Transfer in a Bearing Chamber

作　　者：李斌[1] 王锁芳[1] 刘勇[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《重庆理工大学学报（自然科学）》2010年第11期38-43,共6页Journal of Chongqing University of Technology：Natural Science

摘　　要：以某型航空发动机后支点轴承腔为研究对象,基于代数滑移混合多相流模型和RNGk-ε湍流模型,利用Fluent软件对轴承腔内油气两相流的流动及换热过程进行数值模拟。分析了主轴转速变化及滑油量变化对轴承腔通风口与回油口出油比例和出油温升的影响规律。计算结果表明:主轴转速增加,混合介质更易从通风口排出,通风口出油温升变化较回油口明显;当转速一定时,降低滑油量,出油温升增加。Based on the algebraic slip mixture muhiphase model and RNGκ-ε turbulence model, the commercial computational fluid dynamics software FLUENT was introduced to simulate the flow and heat transfer of air-oil multiphase flow in an aero-engine bearing chamber. The effects of oil flux and rotor speed on the ratio of oil pumped out through different ports and temperature rise were ana- lyzed. The results showed that with the increment of rotor speed, the mixture was pumped out more easily and the temperature rise was more evident through those through its scavenge port. When the rotor speed was the temperature rise of oil pumped out through each port. the vent port of the bearing chamber than fixed, decreasing the flux of oil enhances

关 键 词：轴承腔 两相流 数值模拟 

分 类 号：V233.4[航空宇航科学与技术—航空宇航推进理论与工程]