某涡扇发动机战伤对性能影响仿真研究

Simulation of Battle Damage Influence of Turbo-Fan Engine on Engine Performance

针对某涡扇发动机战伤对发动机性能影响,提出了某涡扇发动机战时破孔损伤对发动机推力、耗油率等性能参数影响的定量计算方法。在分析某涡扇发动机部件气动热力过程、战伤程度与发动机截面参数关系的基础上,建立了某涡扇发动机战伤对性能影响的部件级非线性仿真模型。对某型飞机飞行包线内典型飞行状态的仿真实验结果表明,该涡扇发动机战伤模型能有效地分析发动机战伤程度对发动机性能参数的影响力,而且随着破孔损伤尺寸的增大,发动机耗油率将增大、推力将减小,损伤尺寸对性能参数的影响是一个非线性关系。

A method was put forward to calculate the effect of the engine hole damage on such performance parameters of engine as thrust and fuel consumption.The gas thermodynamics process of the engine and the relation between battle damage degree and the engine section parameters were analyzed on which basis a component-level nonlinear simulation model was established for the influence of the engine battle damage on engine performance.Through simulation experiments of typical flight status in flight envelop of a certain aircraft it was showed that the model can effectively analyzing the engine battle damage influence on the engine performance.With the increasing of the size of the damaged hole the fuel consumption increases and the thrust decreases the relation between the damage size and the performance parameters is nonlinear.