| Citation: | ZHANG Dongqing, DENG Weixin, XING Jianwen, et al. Scramjet free-jet test process at Ma10 conditions[J]. Journal of Aerospace Power, 2023, 38（3）：735-742 doi: 10.13224/j.cnki.jasp.20210720
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Scramjet free-jet tests were conducted in milliseconds in the high-enthalpy shock wave wind tunnel (FD-14A) of China Aerodynamics Research and Development Center at the conditions of replicating flight Mach number 10 and dynamic pressure of 30 kPa. High-speed schlieren and high-speed photography were employed to record the shock waves at the inlet lip and flame spreading process in the combustor, respectively. The free jet test process was analyzed by the optical measurement, scramjet wall pressures and heat fluxes. The ignition and combustion tests were conducted with different equivalent ratios of hydrogen. Distributions of pressures and heat fluxes along the engine wall indicated that ignition and stable combustion were achieved within a wide range of fuel equivalent ratios from 0.50 to 1.37.
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