Experimental Researches on Catalytic Reforming Gas into Scramjet Model Engine

Catalytic reforming combustor can produce high temperature and hydrogen-rich(volumetric fraction up to 16%)flammable gases,which are supplied into scramjet model engine from the back strut of scramjet model engine.Under the same supersonic inflowing conditions,ignition and combustion experiments on the engine are carried out between one case with flammable gas and the other two cases without flammable gases.Their wall pressures,temperatures and flames are compared.The results show that the adding of flammable gases can rapidly ignite,almost without back aerodynamic throat,and the stable combustion can be sustained even with rich fuel.It is demon-strated that flammable gases generated by catalytic reforming can be helpful in igniting and combusting in the hydro-carbon-fueled scramjet engine.