A Simplified Mechanistic Model of Three-Component Surrogate Fuels for RP-3 Aviation Kerosene

In this study, a detailed chemical reaction kinetic model of a three-component surrogate fuel (73% n-dodecane, 14.7% 1,3,5–3-trimethylcyclohexane, and 12.3% n-propylbenzene) for RP-3 aviation kerosene was simplified, and a simplified mechanism for this fuel was obtained and validated. The detailed chemical reaction kinetic model included 257 components and 874 elementary reactions. In the first step, a mechanism consisting of 109 components and 423 elementary reactions was constructed from the detailed model using a directed relation graph (DRG). The second step, based on the first, was to construct an 84-component, 271-elementary-reaction mechanism using a DRG based on error propagation (DRGEP) and computational singular perturbation (CSP). In the third step, path analysis was applied to analyze the combustion paths under atmospheric pressure and high-temperature conditions; the results were compared with those of the detailed mechanism and the simplified mechanism of the second step to remove unimportan...