面向飞行仿真的涡扇发动机转速工程模型研究

Study on the Speed Engineering Model of Turbofan Enginefor Flight Simulation

通过对涡扇发动机总体性能参数的相互影响机理进行分析,建立了标准大气条件下涡扇发动机转速与飞机的飞行高度、飞行速度、油门杆位置的模型。应用相似性理论建立了适应不同大气条件下的发动机转速模型,并进行仿真分析。通过仿真数据与实际的发动机性能数据比较,结果表明基于总体性能建模方法设计的发动机转速模型的仿真结果与实际数据的误差在0.5%以内,上述方法对仿真精度的提高具有重要参考意义,同时可推广应用于发动机推力、油耗等模型的设计。

Through the analysis of the mutual influence mechanism of the overall performance parameters of the turbofan engine,the turbofan engine speed model was established with the flight altitude,flight speed and the throttle position under standard atmospheric conditions.On this foundation,based on similarity theory,an engine speed mod-el suitable for different atmospheric conditions was established,and the simulation results were given and compared with the actual engine performance data.The results illustrate that the error between the simulation result based on the overall performance modeling method and the actual data is less than 0.5%.This method has important reference significance for the improvement of simulation accuracy,and it can also be applied to the design of engine thrust and fuel consumption models.