| Citation: | ZENG Wen, GUO Zhenyu, LIU Jing, et al. Construction and validation of reduced reaction mechanism of RP-3 kerosene surrogate fuel[J]. Journal of Aerospace Power, 2025, 40（1）：20220452 doi: 10.13224/j.cnki.jasp.20220452
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By adopting the reaction class-based global sensitivity analysis (RC-GSA) methodology and species sensitivity analysis (SSA) methodology, the fuel-relevant skeleton mechanism (containing 25 species and 44 reactions) of methylcyclohexane (MCH) was developed. At the same time, with use of the decoupling method, the skeleton mechanism (containing 72 species and 383 reactions) of MCH was obtained. Furthermore, based on the genetic algorithm, the rate constants of fuel-relevant reactions in the skeleton mechanism of MCH were optimized. The results showed that the optimized skeleton mechanism can greatly improve the prediction accuracy of ignition delay time of MCH and MCH, CO, CO2 concentrations. By coupling the skeleton reaction mechanisms of n-decane, n-dodecane, iso-hexadecane, MCH, toluene and the reduced reaction mechanism of C0—C3, a reduced mechanism (containing 121 species and 469 reactions) of the surrogate fuel for RP-3 kerosene was formed. The errors between the simulated ignition delay time and laminar combustion velocity by the reduced reaction mechanism and the corresponding test values of RP-3 kerosene were less than 5% under multiple working conditions. The calculated values of the main species concentration in the oxidation process were in good agreement with the corresponding test values except for some conditions.
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