Initial profile variation rule of solid fuel scramjet combustor with different step height

In order to obtain the initial profile of the solid fuel scramjet combustor and find out its variation rule with different step height, a solid fuel regression rate model was coupled to the quasi-one dimensional flow equations. Then a quasi-one dimensional numerical method for combustor pafermance was established. With this method, combustors with different height were investigated by putting the fuel/air ratio and flow Mach number as the performance optimization criteria. Those combustors show that, as the step height increasing, the total length of the combustor and the length of the straight combustor increase, while the expansion ratio and the length of expansion combustor decrease.