Review of research on solid fuel scramjet engine

The configurations of scramjet using solid fuel as propellant were summarized, and the progress and status of different configurations of scramjet using solid fuel propellant were elaborated, respectively. According to the operating feature of solid-fuel scramjet, solid-fuel dual-combustor scramjet and solid-fuel rocket scramjet, the advantages and existing problems of different configurations were analyzed, and some suggestions for further research were proposed. The research results reveal that though solid fuel can ignite and burn in supersonic combustor of solid-fuel scramjet, the combustion efficiency of propellant is low and the scramjet cannot operate for a long time. The solid-fuel rocket scramjet is beneficial to ignition and stable combustion of solid fuel, and can also operate for a long time. The solid-fuel rocket scramjet has a bright research and application prospect.