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首页> 外文OA文献 >A computational study on the effect of exhaust gas recirculation on auto-ignition timing of HCCI engine fuelled with N-heptane, iso-octane, ethanol and methane
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A computational study on the effect of exhaust gas recirculation on auto-ignition timing of HCCI engine fuelled with N-heptane, iso-octane, ethanol and methane

机译：废气再循环对正庚烷，异辛烷，乙醇和甲烷供油的HCCI发动机自燃正时影响的计算研究

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摘要

The homogeneous charge compression ignition, HCCI, uses compression ignition to auto-ignite a homogeneous air/fuel mixture. Using internally trapped engine exhaust gas, IEGR, as an indirect control method, HCCI offers superior fuel economy and pollutant emission reductions. Fuel structure has direct impact on its auto-ignition performance. In this research, the effect of IEGR on auto-ignition timing of four typical fuels with distinct Octane number: N-heptane, Iso-octane, Ethanol and Methane have been studied using a single zone adiabatic combustion model and detailed chemical kinetics. It was found that the introduction of internal exhaust gas recirculation, IEGR, delays ignition timing of all four fuels, but differently. N-heptane is the most sensitive fuel to IEGR, iso-octane and ethanol has a much higher endurance, while methane is somewhere in between.
机译：均质充量压缩点火HCCI使用压缩点火自动点火均匀的空气/燃料混合物。 HCCI使用内部捕获的发动机废气IEGR作为间接控制方法，可提供出色的燃油经济性和污染物排放量减少。燃料结构对其自动点火性能有直接影响。在这项研究中，使用单区绝热燃烧模型和详细的化学动力学研究了IEGR对具有不同辛烷值的四种典型燃料自燃正时的影响：正庚烷，异辛烷，乙醇和甲烷。已经发现，引入内部废气再循环IEGR会延迟所有四种燃料的点火正时，但有所不同。正庚烷是对IEGR最敏感的燃料，异辛烷和乙醇具有更高的耐久性，而甲烷介于两者之间。

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