Abstract
In the gasoline combustion team of Cross-ministerial Strategic Innovation Promotion Program (SIP), “Innovative Combustion Technology,” gasoline surrogate fuels composed of isooctane, normalheptane, toluene, isooctene, and methylcyclohexane, has been employed to standardize fuel properties. A proto-type of detailed reaction mechanism for the five-component gasoline surrogate fuels, consisting of 1759 species and 5799 reactions, has been developed. Japanese regular gasoline with the research octane number of 90 has been modeled with the mole fractions of the five components of 0.238247, 0.199032, 0.38830, 0.121247, and 0.38830, respectively. In the present study, based on knowledge derived from reaction path analysis for each component, a small-scale reaction mechanism for the regular gasoline surrogate fuel was developed. Species and reactions were reduced to 55 and 92, respectively. This mechanism can represent not only the relationships between initial temperature and ignition delay time, but also the profiles of heat release rate during ignition process with the initial temperatures between 600 K and 1200 K, and the equivalence ratios between 0.5 and 1, presented using the detailed mechanism, accurately except for low-temperature oxidation induction times with fuel, O2, and N2 concentrations decreased.
