超燃模型发动机中引入催化重整燃气的试验研究

催化重整燃烧室能够产生氢体积分数高达16%的高温富油可燃燃气,所产生的可燃燃气从后支板供入到超燃模型发动机中,进行了直连式联调试验.在相同超音速来流状态下,与不通入可燃燃气的两种工况进行了压力、出口火焰形貌和壁面温度的对比,发现可燃燃气的加入能够在几乎不加入高压气堵情况下迅速着火,并能维持住稳定的超音速燃烧,在富油恶劣状态下,燃烧良好.结果表明,催化重整可燃成分在超燃模型发动机中起到了助燃和稳定燃烧的作用.

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.