超声速民机推进系统发展趋势及难点分析

The supersonic civil aircraft has objective market prospect in the future, and the key lies in development of propulsion system with economy, environmental protection and comfort. The overall development of supersonic civil aircraft was analyzed. The design differences and challenges of supersonic civil aircraft propulsion system with low fuel consumption, low noise and low emission were compared and analyzed with those of subsonic civil aircraft propulsion system. The advantages and bottlenecks of turbojet configuration, medium-bypass turbofan configuration and variable cycle configuration engines as supersonic civil aircraft propulsion systems were discussed in detail. The internal principle of difficulty in taking into full account the fuel consumption, emission and noise was analyzed. An idea of taking fuel consumption, noise and emission into full account by improving engine flow capacity was put forward, and the main reasons for limiting the current engine flow capacity were analyzed from two aspects: low-pressure turbine work limitation and inner bypass flow area limitation. Finally, based on the original innovation of aero-thermal layout of variable cycle engine, for the purpose of providing reference and support for the development of supersonic civil aircraft propulsion system, the integrated design and evaluation methods for performance, emission and noise should be developed to support the development idea of realizing simultaneous development of future supersonic civil aircraft propulsion system’s fuel consumption level, emission level and noise level.