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环境湿度会对民用涡扇发动机的性能产生影响。在发动机部件匹配方法的基础上,引入湿度对气体性质和部件特性的修正模块,建立环境湿度对民用涡扇发动机影响的仿真模型;定量分析不同湿度对发动机推力、转速、进口流量等性能参数的影响,得到相应的湿度修正曲线;按照CCAR-25部中有关湿度的考核要求,计算相应湿度对发动机飞行包线内的六个典型工况的影响;将本文发展的仿真模型所得结果与文献结果进行对比。结果表明:发动机高温起飞时受湿度影响最大,其推力下降了0.56%;为了弥补推力损失,风扇相对换算转速需要提高0.23%;本文所得某涡喷和某涡扇发动机的修正曲线与文献结果趋势一致、量级相当,验证了仿真模型的可靠性。
Ambient humidity can have an impact on the performance of a turbofan engine. On the basis of matching method of engine components, the paper introduces a module of humidity correction to gas properties and component characteristics, establishes a simulation model of the effect of ambient humidity on civil turbofan engine, and quantitatively analyzes the performance parameters of different humidities on engine thrust, speed, inlet flow The corresponding humidity correction curve is obtained. According to the assessment requirements of humidity in CCAR-25, the influence of relative humidity on six typical working conditions in the flight envelope of the engine is calculated. The simulation results obtained in this paper and the results comparing. The results show that when the engine is taking off, the engine temperature is the most affected by the humidity, and its thrust is decreased by 0.56%. In order to compensate for the thrust loss, the relative rotation speed of the fan needs to be increased by 0.23%. The correction curves and literature results of a certain turbojet and a turbofan engine Consistent, order of magnitude, verify the reliability of the simulation model.