21世纪的世界航空动力技术将继续加速发展，有可能出现革命性变化。传统的燃气涡轮发动机仍具有巨大的发展潜力；随着超燃冲压发动机以及涡轮和火箭基组合循环发动机的应用，高超声速飞行将成为现实，并有可能迎来以高超声速空天往返飞行为标志的新的航空时代；脉冲爆震发动机、超微型发动机等新概念发动机必将登上历史舞台；新能源航空发动机将占据一席之地；航空动力技术将继续在人类科技发展和社会进步中占据重要的地位。

The accelerating development trends of world aeropropulsion technology will be persistent in the 21st century and some revolutionary changes will occurr. With the breakout of some key technologies, the traditional gas turbine engine will be improved greatly. The achievements of power for ultra-supersonic flight vehicles would result in a new generation of aviation with the application of supersonic combustion screamjet and combined engine as turbine based combined cycle (TBCC) engine and rocket based combined cycle (RBCC). With the innovation of new concepts and scheme, some new concept engines will be invented and applied, such as the pulse denotation engine (PDE) and super micro-engine based on micro-mechanical-electron technology. Instead of the conventional hydrocarbon fuel, some new energy will be applied in future advanced aeroengine. The developments of aeropropulsion technology in the new century will promote the progress of civilization and human being society greatly just as in the past 100 years.