| Citation: | HUANG Jinzhi, LI Kun, WEI Jianfei, et al. Effect of boundary layer combustion on near-wall heat and mass transport processes of hydrogen and hydrocarbon fuel films[J]. Journal of Aerospace Power, 2025, 40（11）：20240465 doi: 10.13224/j.cnki.jasp.20240465
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Large eddy simulations of hydrogen and hydrocarbon fuel films with boundary-layer combustion were conducted, focusing on the effects of boundary-layer combustion on the near-wall heat and mass transport processes of fuel films. The results showed that boundary layer combustion effectively reduced the heat and mass transport fluxes between the mainstream and fuel film, which enhanced the heat insulating performance of the film. However, the decrease in heat flux within the hydrogen film was not adequate to offset the negative impacts of heat release and consumption of hydrogen with high heat capacity during combustion, leading to a significant deterioration of the heat insulating performance during boundary layer combustion. On the contrary, the reduction of heat flux in the hydrocarbon film had synergistic effect with the heat absorption of the near-wall pyrolysis reactions, leading to a substantial enhancement in the heat insulating performance of the hydrocarbon film.
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