Experimental and kinetic modeling study of the effect of fuel composition in HCCI engines
Experimental and kinetic modeling study of the effect of fuel composition in HCCI engines
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DOI：
10.1016/j.proci.2008.08.001
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
M. Mehl;T. Faravelli;E. Ranzi;D. Miller;N. Cernansky
中科院分区：
文献类型：
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作者：
M. Mehl;T. Faravelli;E. Ranzi;D. Miller;N. Cernansky
分析了三种不同燃料替代物（包含正庚烷、异辛烷、甲苯和 1-戊烯）在 HCCI 条件下的化学行为。对正在运行的 HCCI 发动机进行了缸内成分的新实验测量，该发动机配备了特殊定制的气缸盖，可以直接对气体进行采样。将这些数据与从详细的动力学机制和一维/准维发动机模型相结合获得的计算结果进行比较。该模型可以研究不同燃料替代品的自燃和燃烧行为。在对模型参数和化学计量效应进行初步分析后，讨论了不同燃料替代品的燃烧化学。模型计算正确地再现了三种替代物的燃烧行为。此外，参数分析可以更好地解释发动机测量结果。这项工作中采用的耦合方法适合分析不同燃料配方的影响，有助于发动机和燃料的协同发展。
The chemical behavior of three different fuel surrogates, containing n-heptane, iso-octane, toluene, and 1-pentene, under HCCI conditions is analyzed. New experimental measurements of the in-cylinder composition have been carried out on a running HCCI engine equipped with a special customized cylinder head allowing the direct sampling of the gas. These data were compared with calculation obtained from a detailed kinetic mechanism coupled with a 1-D/quasi-D engine model. This model allows to study the autoignition and the combustion behavior of different fuel surrogates. After a preliminary analysis on the model parameters and of stoichiometry effect, the combustion chemistry of different fuel surrogates is discussed. Model calculations correctly reproduce the combustion behavior of the three surrogates. Moreover the parametric analysis allowed better interpretation of the engine measurements. The coupled approach adopted in this work showed to be suited to analyze the effect of different fuel formulation and help the synergistic development of both engines and fuels.