In order to study the oxidation and combustion characteristics of n-decane fuel in aviation kerosene and to reduce the scale of the mechanism

the kinetic mechanism of chemical reaction is systematically simplified. Firstly

reaction class-based global sensitivity analysis and path sensitivity analysis

combined with rate of production

were used to identify key reaction classes in the sub-mechanism of n-decane macromolecules and select representative reactions. Secondly

based on the decoupling method

the skeleton sub-mechanism is coupled with the C0-C3 sub-mechanism to form the initial skeleton mechanism of n-decane. Finally

according to the ignition delay time and the mole fraction of fuel

CO and CO2

genetic algorithm was used to optimize the reaction rate coefficients of the fuel sub-mechanism in the range of uncertainty

so as to improve the accuracy of the skeleton mechanism. Finally

a n-decane skeleton mechanism containing 48 species and 209 chemical reactions was obtained. The results show that the mechanism has high accuracy in predicting laminar flame speed

ignition delay time and concentration of important components in a wide range of operating conditions.