正庚烷均质压燃燃烧简化动力学模型

Reduced Chemical Kinetic Model of n-Heptane for HCCI Combustion

在详细化学反应动力学研究的基础上,通过对正庚烷均质压燃燃烧各阶段反应途径分析和敏感性分析, 构建了一个新的包括35种物质和41个基元反应的正庚烷均质压燃简化动力学模型．在发动机模拟方面,对此模型进行有效性分析,结果表明,在一定的边界条件范围内,简化动力学模型在着火时刻、缸内温度和压力方面都与详细动力学模型吻合较好,简化动力学模型适用于模拟HCCI部分燃烧边界条件．

A reduced model of n-heptane is developed on the basic of detailed mechanism by sensitivity analysis and reaction path analysis of every stage of combustion. The new reduced mechanism consists of 35 species and 41 reactions, and it is effective under engine conditions. The effective analysis of it shows that it gives similar predictions to the detailed model in ignition timing, in-cylinder temperature and pressure. Furthermore, the reduced mechanism can be used to simulate boundary conditions of partial combustion and the results are in good agreement with the detailed mechanism.