航空发动机循环参数对飞机性能的影响

Influence of Aero-engine Cycle Parameters on Aircraft Performance

为分析发动机循环参数对飞机性能的影响,分析发动机参数对于发动机性能的影响规律,同时分析发动机的性能衰减原因,并提出生产使用建议。通过给定飞机的基本气动特性和发动机的安装特性,建立了飞机起飞性能及机动性能计算的模型。通过计算发动机推力对于起飞时间、起飞过程的水平距离、爬升率及加减速时间的影响规律,分析发动机推力变化对于飞机起飞及机动性能的影响。分析结果标明,增大发动机进气流量及风扇和压气机的压比,能显著提升涡轮前温度和发动机推力,增大发动机推力能明显缩短飞机的起飞时间,提升飞机的爬升率、缩短加减速时间,从而提升飞机纵向改变高度和水平改变速度的能力,但发动机推力对于飞机性能的增强效果随着推力的增加逐渐减弱。

In order to analysis the effect of aero-engine cycle parameters on aircraft performance,the effect of engine parameters on its performance and the reasons of performance decay are analyzed,and the production and use suggestions are provided.Through setting the basic aerodynamic characteristics of airplane and engine installation characteristics,the takeoff performance and motor performance model are established.By calculating the influence of engine thrust on departure time,horizontal distance of takeoff,climb rate,and the acceleration and decelation time,the influence of engine thrust variation on takeoff and maneuvering performance of aircraft is analyzed.The analysis results show that increasing the engine intake flow rate and the pressure ratio of the fan and compressor can significantly increase the turbine front temperature and the engine thrust,and increasing engine reasoning can significantly shorten the time of aircraft takeoff,increase the climb rate,shorten the acceleration and deceleration time,so as to improve the ability of aircraft to change altitude and speed in longitudinal direction,but the enhancement effect of engine thrust on aircraft performance gradually decerease with the increase of thrust.