Geon Wook YIM, Hyoung Jin LEE

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST2024-00180

In a scramjet combustor, combustion characteristics were observed based on the L/D ratio of the cavity under equivalent equivalence ratio conditions. Combustion experiments were conducted at a Mach number of 2.0 and a pre-temperature of 1400 K inside the combustor. Hydrogen was used as the fuel, and the L/D ratios of the cavity were set at 7 and 12. The equivalence ratio was maintained at 0.4. The experimental results revealed a mode transition at L/D ratios of 7 and 12. At L/D 12, a mode transition occurred between cavity shear-layer stabilized combustion and cavity shear-layer/recirculation stabilized combustion. At L/D 7, a similar combustion mode transition occurred as at L/D 12, but the Jet-wake combustion mode also manifested. According to the experimental results, under the same equivalence ratio, L/D 12 exhibited more stable characteristics.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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