The Effect Analysis of Flow Jam on Two-Meter Direct-Connection Firebox Model

In the supersonic firebox, because of the high speed and the low static temperature, the mix of the fuel and oxidant, the ignition of the fuel and the stabilization of the flame are difficult problems in the researches of the scramjet, especially for the kerosene engine, which must use some aidant measure to force ignition. In the report of many researches, the ignition by double firebox, by combustion heater, by plasma portfire, by hydrogen and by afterbody baffle are used as the aidant igniting measure. In the ignition and combustion test of two-meter firebox model, which was accomplished on the 3.5kg/s direct-connection facility in HAI-CARDC, the ignition of direct-connection firebox model, is implemented by afterbody baffle and gas-injecting. In this paper, the flow characteristic of firebox in the different stream jam is analyzed.