Mixing and flame holding with air inlet configuration in scramjet combustor

Numerical study of shock wave interaction on transverse jets through multiport injector arrays in supersonic crossflow

“…Achieving good penetration and dispersion across the combustor is of fundamental importance to aid in improved mixing [10] and the degree of mixing is far more dependent on penetration at the injector, than it is on the downstream turbulent diffusion [25]. Mixing downstream is also dependent upon on the relative change in jet momentum and for an increased free stream Mach number there is a drastically decreased spreading rate of the supersonic mixing layer, which has a negative effect on the mixing of the injectant [26]. In terms of transverse injection, there are two distinct mixing regions that are governed by different flow mechanisms.…”

Influence of the angle of incident shock wave on mixing of transverse hydrogen micro-jets in supersonic crossflow

“…Achieving good penetration and dispersion across the combustor is of fundamental importance to aid in improved mixing [10] and the degree of mixing is far more dependent on jet penetration at the injector, than it is on the downstream turbulent diffusion [25]. Mixing downstream is also reliant upon on the change in jet momentum and for an increased free stream Mach number there is a drastically decreased spreading rate of the supersonic mixing layer, which does not have a positive effect on the mixing of the injectant [26]. In terms of transverse injection, there are two distinct mixing regions that are governed by different flow mechanisms.…”

Parametric effects in a scramjet engine on the interaction between the air stream and the injection

“…They found that a large email: gladrain2001@yahoo.com.cn injection angle could generate a large total pressure loss ratio and accomplish a high mixing efficiency in a short distance, but injecting fuel obliquely results in a better near-and far-field mixing compared to traverse injection. Further, Ali et al [8][9][10] discussed the influences of the variation of the air stream angle [8], the width of the inlet [9], and the main flow inlet configurations [10] on the mixing of the fuel with the oxidizer and the flame-holding capability of the combustion flow field. They concluded that the mixing was dominated by the recirculating flow in the upstream region of the injector and by the mass concentration of the injection flow in the downstream region.…”