In this work, ignition and flameholding and reacting flow characteristics of a kerosene fueled dual-mode scramjet combustor were investigated experimentally. The effects of the inlet stagnation pressure on the ignition and reacting flow characteristics were evaluated. The results shows that the combustor will have a better flameholding capacity with a higher inlet stagnation pressure. For the cases with stabilized kerosene combustion, its wall pressure distributions showed that, with same kerosene equivalence ratio and inlet temperature, the combustion efficiency was increased with increase of the inlet stagnation pressure. Combustion luminosity images were pictured for every test, and two distinct combustion stabilization modes , upstream cavity and downstream cavity stabilized combustion modes, were identified. The combustion luminosity images showed that all kerosene & hydrogen combustions with different fueling conditions were upstream cavity stabilized mode. At conditions with higher inlet pressures or that with higher kerosene equivalence ratios, the kerosene combustions were upstream cavity stabilized mode, and, at conditions with lower inlet pressures or that with lower kerosene equivalence ratios, the combustions were downstream cavity stabilized combustion mode. At conditions with middle inlet pressure or kerosene equivalence ration, oscillations of combustion mode occurred.
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