甲烷HCCI燃烧反应机理简化与分析  

Reduction and Analysis of Kinetic Model for Methane HCCI Combustion

作　　者：刘欣[1] 蒋炎坤[1] 张建平[1] 万里平[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《武汉理工大学学报》2012年第1期71-74,共4页Journal of Wuhan University of Technology

基　　金：留学回国人员科研启动基金(教外司留[2011]1139号)

摘　　要：通过分析系统温度变化与主要中间产物生成率,以敏感度分析为基础对GRI-MECH3.0机理进行简化,最后得出一个包含25种组分、36个反应的简化机理。此简化机理适用于天然气HCCI模式燃烧着火相位研究,与详细机理在着火点预测上吻合良好。经验证,在较广的初始压力、温度、转速、压缩比、空燃比变动范围内可以保证与详细机理相近的精度。同时在简化过程中梳理出着火延迟期的关键反应。The natural gas HCCI combustion is investigated numerically and a reduced chemical kinetic model for GRI-MECH3.0 is described.By analyzing the system temperature and some rate of production of reactants,a 36-step,25-species reduced mechanism was finally acquired.The ignition delay predicted by the reduced mechanism show great agreement with detailed mechanism in a wide range of various temperature,pressures,equivalence ratios,engine speed and air/fuel ratio.The studies have shown that some reactions play an important role during the ignition delay.

关 键 词：天然气 HCCI 敏感度分析 机理简化 着火延迟 

分 类 号：TK43[动力工程及工程热物理—动力机械及工程]