RP⁃3航空煤油低温氧化特性的试验与数值计算

The low⁃temperature oxidation of RP⁃3 aviation kerosene and its surrogate fuel (n⁃decane (mole fraction of 0.14)/n⁃dodecane (0.1)/iso⁃cetane (0.3)/methylcyclohexane(0.36)/toluene (0.1)), were experimentally tested in a jet stirring reactor (JSR) at the conditions of the pressure of 0.1 MPa, the temperature range of 550-1 100 K, the equivalence ratios of 0.5 and 1.0, and the residence time of 2 s.Meanwhile, through the reaction class⁃based global sensitivity analysis, decoupling methodology and multi⁃objective genetic algorithm, the reduced reaction kinetic mechanism of the surrogate fuel (including 181 species and 872 reactions) was established, and the low⁃ temperature oxidation characteristics of the surrogate fuel were simulated.The results showed that the temperature⁃dependent trends of the mole fractions of main species in the low⁃temperature oxidation process of the surrogate fuel were in good agreement with RP⁃3 aviation kerosene.The reduced reaction mechanism of the surrogate fuel for RP⁃3 aviation kerosene had a good prediction of the temperature⁃dependent trends of the mole fractions of main species during the low⁃temperature oxidation of the surrogate fuel.However, there were still some deviations in the prediction of the peak mole fractions and negative temperature coefficient (NTC) effect of some species.