Two schemes were used in mechanism simplification program ReaxRed to simplify aviation kerosene RP-3 semi-detailed chemical reaction kinetics model of three component surrogate fuels. The first scheme used directed relation graph(DRG) method to obtain 109 species and 423 elementary reactions. The second scheme used directed relation graph based on error propagation(DRGEP) method and computational singular perturbation(CSP) method

which obtained 84 species and 271 elementary reactions on the basis of the result of the first scheme. The experimental data of ignition delay of kerosene was adopted to demonstrate the rationality of the simplified mechanism created by the second scheme

the numerical simulation results of laminar flame speed

temperature and mole fraction of important product were compared and analyzed. Results indicated that the second scheme with high calculation accuracy was more economical and practical compared with the first scheme. Under various operating conditions

the average error between the ignition delay time of the second schemes simplified mechanism and the ignition delay time of the semi-detail mechanism was within 6% and their error in the flame propagation speed did not exceed 8%. In order to further verify the simplified mechanism of the second scheme

RP-3 aviation kerosene was adopted as fuel and an experimental study of premixed burner of the Bunsen burner was conducted. The results showed that the numerical calculation results of the simplified mechanism were consistent with the experimental data.