研究了混合加力涡扇发动机过失速特性数值模拟方法。采用了轴流压缩系统的逐级动态响应模型 ,并发展了风扇出口分流环内外流耦合分析模型。采用两种不同方式诱导了涡扇发动机过失不稳定流态。结果表明发动机的函道比的动态突变可成为预测涡扇发动机进入不可恢复失速状态的关键参数 The numerical simulation method for the stalling speed of hybrid afterburner turbofan engine is studied. The gradual dynamic response model of the axial compression system is adopted, and the coupled model of internal and external flow of the fan outlet split ring is developed. Two different ways were used to induce turbofan engine fault instability flow. The results show that the dynamic change of the engine’s bypass ratio can be the key parameter to predict the entry of the turbofan engine into an unrecoverable stall state