涡扇发动机过失速性能数值模拟

Numerical simulation on post-stall behavior of turbofan engine

关键词:  涡轮风扇发动机  风扇  压气机  失速特性  数值仿真

Key words:  Turbofan engine  Fan  Air compressor  Stalling characteristic  Numerical simulation

摘要:

基于风扇、压气机的级特性 ,发展了涡扇发动机过失速一维非定常逐级模拟技术 ,采用了分析压缩系统过失速响应的动态滞后方法 ,通过调节发动机尾喷管的出口面积来模拟发动机的过失速状况 ,得到了合理的定性结果

Abstract:

Based on the method of characteristics of the fan,compressor and turbine,a stage by stage axial flow compression system model was established.It was used to predict the post stall behaviors such as surge and rotating stall.A first order lagging method was used to simulate the compressor dynamic response during post stall conditions.The modeling technique was applied to a turbofan engine to analyze the influence of external disturbances,such as the change of the exhaust nozzle area.It shows that the numberical results compare favorably with previous results.