航空发动机油的性能及热物理参数分析

Performances and Thermophysical Parameters Analysis of Aeroengine Lubricants

中型航空发动机(功率不大于3680 kW)和小型航空发动机(功率小于1420 kW)的体积小,重量轻,启动性能好,振动小,运转平稳,应用十分广泛。但中小型航空发动机润滑系统散热困难,航空发动机油将承受更高的工作温度,因此对航空发动机油及润滑系统均有着极高的要求。对中小型航空发动机油的性能进行了综述。建立了航空发动机油的密度,动力黏度,比热容和导热率等热物理参数随温度和/或压力变化的数学模型,这些数学模型对分析航空发动机油在润滑系统中的状态及对航空发动机润滑系统的仿真设计具有重要的意义。(图5表0参考文献3)

Medium-size aeroengine(power not more than 3680 kW)and small-size aeroengine(power less than 1420 kW)was small volume,light weight,good start-up performance,small vibration,stable operation.Its application was very wide.However,it was difficult for the lubrication system of small and medium-size aeroengine to dissipate heat,and the aeroengine lubricants would bear higher working temperature,so there were high requirements for the aeroengine lubricants and lubrication system.The performances of small-size/mediumsize aeroengine lubricants were reviewed.The mathematical models of the aeroengine lubricants were established which indicated the changes of the density,dynamic viscosity,specific heat capacity and thermal conductivity with the changes of temperature and/or pressure.These mathematical models were of great significance to analyze the status of aeroengine lubricant in the lubrication system and to the simulation design of the aeroengine lubrication system.(Charts5 Tables0 References3)