Under the guidance of the major two-period research program of the National Natural Science Foundation of China,the hypersonic technique has steadily matured.Further development of its core component-the airbreathing ...Under the guidance of the major two-period research program of the National Natural Science Foundation of China,the hypersonic technique has steadily matured.Further development of its core component-the airbreathing hypersonic propulsion system,and of some novel concepts of the combined cycle engine,is needed urgently to meet the power requirements of single/two-stage-to-orbit manned spacecraft and hypersonic aircraft,such as the SR-72(Fig.1).However,the resident time of the high-speed flow in the scramjet combustor is very limited,only a few milliseconds,and the generation of useful thrust through additional heat at such high speeds is still a challenging task(Huang et al.,2019).Therefore,many mixing augmentation devices have been proposed and investigated,as well as flame propagation and stabilization mechanisms in the supersonic or hypersonic flow(Huang et al.,2018).Fig.2 shows the operational process in an airbreathing hypersonic propulsion system.The developed computational fluid dynamics(CFD)approaches,such as the efficient WENOCU4 developed by Li et al.(2020),have contributed greatly to ground experimental testing,especially of approaches with high-order accuracy.展开更多
文摘Under the guidance of the major two-period research program of the National Natural Science Foundation of China,the hypersonic technique has steadily matured.Further development of its core component-the airbreathing hypersonic propulsion system,and of some novel concepts of the combined cycle engine,is needed urgently to meet the power requirements of single/two-stage-to-orbit manned spacecraft and hypersonic aircraft,such as the SR-72(Fig.1).However,the resident time of the high-speed flow in the scramjet combustor is very limited,only a few milliseconds,and the generation of useful thrust through additional heat at such high speeds is still a challenging task(Huang et al.,2019).Therefore,many mixing augmentation devices have been proposed and investigated,as well as flame propagation and stabilization mechanisms in the supersonic or hypersonic flow(Huang et al.,2018).Fig.2 shows the operational process in an airbreathing hypersonic propulsion system.The developed computational fluid dynamics(CFD)approaches,such as the efficient WENOCU4 developed by Li et al.(2020),have contributed greatly to ground experimental testing,especially of approaches with high-order accuracy.
