高温燃油对航空发动机控制系统的影响分析

随着新一代飞机性能的提高,燃油成为飞机的主要热沉,承担巨大的散热压力,导致发动机进口燃油温度大幅提高.为了保证发动机控制系统在高温燃油环境下的控制品质和工作可靠性,针对高温燃油的特性变化对发动机控制性能的影响进行了分析,同时分析了高温燃油对液压机械装置、电气元件和发动机滑油系统的影响,给出了燃油温度限制的参考值.研究结果表明,必须对燃油温度进行限制才能保证发动机控制系统在高温燃油环境下正常工作.

Influence of High Fuel Temperature on Aeroengine Control System

With the performance enhancing of new generation aircraft, the fuel undertakes tremendous heat exchange task, which is becoming the primary heat sink of aircraft. It results in substantial increase of temperature in engine fuel entry. To ensure the control quality and operational reliability of engine control system in the high fuel temperature circumstance, the effect of the characteristic variation of high fuel temperature on the engine control performance was analyzed, and its influence on the hydraulic machinery device, electric elements and engine oil system was also investigated. The reference value of temperature limitation was obtained. The results show that the fuel temperature of aeroengine should be limited to ensure the control system of engine operating properly.