一、引言目前涡轮发动机已是航空运输的主要动力,双转子或三转子涡扇发动机已稳定地成为航空发动机的基本结构型式。在多数航空发动机型号中,发动机的安全工作和可靠性等级都已达到相当高的水平。商用涡扇发动机的使用和维修技术也已趋稳定。未来利用新材料和新一代设计的航空发动机在设计、制造、使用、维修上不会有重大的改变。尽管航空发动机有很高的可靠性,由于种种原因,发动机在飞行中仍偶有失效。发动机在空中失效产生的危险飞行状态,仍然需要人们对 I. INTRODUCTION At present, the turbine engine is the main power of air transport. The twin-rotor or three-rotor turbofan engine has steadily become the basic structure type of aeroengine. In most aero-engine models, engine safety and reliability levels have reached quite high levels. Commercial turbofan engine usage and maintenance techniques have also stabilized. In the future, the design, manufacture, use and maintenance of aeroengines that utilize new materials and new generation designs will not change significantly. Despite the high reliability of aero engines, the engines are still occasionally ineffective in flight for a variety of reasons. Dangerous flight conditions caused by engine failure in the air, still need people to right