| Citation: | LIU Yu, ZHANG Yuanhang, WANG Jinduo, et al. Experimental study on laminar combustion characteristics of bio-jet fuel[J]. Journal of Aerospace Power, 2025, 40（12）：20240861 doi: 10.13224/j.cnki.jasp.20240861
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The laminar combustion characteristics of a certain bio-jet fuel with hydroprocessed esters and fatty acids (HEFA) technology were studied. The laminar burning velocity (LBV) of HEFA bio-jet fuel and HEFA bio-jet fuel/RP-3 mixed fuel was obtained by a constant volume combustion experimental device. The experimental parameters included equivalence ratios (0.8—1.4), initial pressures (0.05, 0.1, 0.15 MPa), initial temperatures (450, 470 K) and HEFA mixing ratios (0, 0.1, 0.2, 0.3, 0.5), et al. The effects of the equivalence ratio, initial pressure and initial temperature on the LBV of HEFA bio-jet fuel and the HEFA mixing ratio on the LBV of HEFA/RP-3 mixed fuel were analyzed. It was found that with the increase of equivalence ratio, the LBV of HEFA bio-jet fuel showed a trend of increasing first and then decreasing, and its peak value appeared near the equivalence ratio of 1.1. As the initial pressure increased from 0.05 MPa to 0.15 MPa, the LBV of HEFA bio-jet fuel decreased by 13.54%. As the initial temperature increased from 450 K to 470 K, the LBV of HEFA bio-jet fuel increased slightly. With the increase of HEFA mixing ratio from 0 to 0.5, the LBV of HEFA/RP-3 mixed fuel increased by 3.85%. The results showed that compared with RP-3 jet fuel, although the carbon number distribution of HEFA bio-jet fuel was higher, its chemical composition was dominated by alkanes, which led to its LBV higher than that of RP-3 jet fuel, so that the LBV of the mixed fuel after blending HEFA slightly increased. This study could provide a theoretical basis for the application of bio-jet fuel in aircraft engines.
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