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- 2015
四组分汽油替代燃料的化学动力学模型
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Abstract:
该文通过反应路径分析和灵敏度分析, 发展了甲苯氧化子机理, 进而构建四组分(异辛烷、正庚烷、甲苯、乙醇)汽油替代燃料的化学动力学模型。该模型包含75个组分和305个基元反应。验证结果表明: 该模型不仅能够准确计算单组分燃料的着火延迟时间、火焰传播速度和火焰结构, 而且在一定的压强和温度范围内, 能够较准确地计算多组分汽油替代燃料的着火延迟时间, 反映不同辛烷值汽油的自燃特性。该文提出的四组分汽油替代燃料动力学模型包含较少的组分数与基元反应数, 更有利于在汽油燃烧的多维计算流体动力学(CFD)模拟中得到应用。
Abstract：The sub-mechanism of toluene oxidation was identified using path and sensitivity analyses. A chemical kinetics mechanism for a four-component gasoline surrogate fuel made of iso-octane/n-heptane/ethanol/toluene includes 75 species and 305 elementary reactions. The validated results show that the mechanism gives good agreement with experimental data for the pure fuel ignition delay time, laminar flame speed, and chemical structure predictions. The model also predicts the ignition delay time of multi-component gasoline surrogate fuels in the specified pressure and temperature range and reproduces the auto-ignition characteristics of different research octane number (RON) gasoline fuels. Since this chemical kinetics model has few species and few reactions, the mechanism can be used in multidimensional, computational fluid dynamics (CFD) simulations of the gasoline combustion.
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