Numerical Simulation of Plasma Jet Assisted Combustion Based on the Strut Combustor

Inserting a fuel injection strut into the combustor of the scramjet engine or injecting plasma jet into the combustor are two proven effective ignition and combustion assistance aids. Based on this, a strut with Alternating-Wedge structure capable of simultaneously injecting fuel and plasma jet is designed and numerical simulation is carried out. The numerical simulation results show that the fuel injected from the side of the strut is affected by the Alternate-Wedge structure, the distribution in the downstream is wider, and distribution of the fuel shows a clear streamwise vortices structure; Different plasma jet medium have different combustion-assisted effects. The effect of combustion-assisted is positively correlated with the concentration of O-2 in the jet medium; increasing the temperature of the plasma jet can improve the combustion efficiency of the combustor within a certain range.