ガソリンサロゲート燃料の詳細反応機構が記述する着火特性を高度に再現可能な簡略化反応機構を用いたノッキング予測モデルの構築

抄録

A detailed reaction mechanism for five-component gasoline surrogate fuels containing isooctane, normalheptane, isooctene, methylcyclohexane, and toluene, consists of 1759 species and 5799 elementary reactions. Ignition characteristics for regular gasoline were simulated with the mixing fractions of 0.238247, 0.199032, 0.121247, 0.053173, and 0.38830 for isooctane, normalheptane, isooctene, methylcyclohexane, and toluene, respectively. Reaction paths during ignition process for each component were analyzed with the initial temperatures of 650 K, 850 K, and 1100 K located in the cool-flame dominant, negative temperature coefficient, and blue-flame dominant regions, respectively. Based on full knowledge derived from the reaction path analysis, a skeletal reaction mechanism for regular gasoline consisting of 46 species and 80 reactions, was developed and validated. Ignition delay times with initial temperatures between 600 K and 1200 K using the skeletal mechanism, agree well with those using the detailed mechanism.