A reduced chemical kinetic mechanism for the oxidation of three-component fuel comprising iso-octane/n-heptane/ethanol has been developed. The mechanism consists of 50 species and 193 elementary reactions and emphasizes the ignition process. Using path and sensitivity analyses, the path of primary reference fuel (PRF) oxidation and major elementary reactions at high and low temperatures are given. The validated results show that the present mechanism gives good agreement with experimental data for ignition delay time predictions. Because of the few species and reactions presenting in the chemical kinetic model, the mechanism is applicable to multidimensional computational fluid dynamic (CFD) simulation of the co-combustion of gasoline with ethanol.%提出一个包括异辛烷、正庚烷和乙醇的三组分燃料的着火动力学模型,该机理包括50个组分和193个反应.通过路径分析和灵敏度分析,给出了基础燃料在高低温条件下的不同反应路径和影响氧化过程的重要基元反应.该机理预测的单组分(异辛烷、正庚烷、乙醇)燃料、双组分基础燃料和三组分燃料的点火延迟时间与实验值有很高一致性.本文机理包含较少的组分数与反应数,因而可适用汽油掺烧乙醇的多维计算流体动力学(CFD)数值模拟.
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