Three-Dimensional Models for Analyzing the Cyclic Variations in a Lean Burn CNG Engine  

作　　者：李国岫 虞育松 刘建英 

机构地区：[1]School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University

出　　处：《Journal of Beijing Institute of Technology》2007年第3期274-278,共5页北京理工大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(50406003)

摘　　要：Three-dimensional models, consisting of the flame kernel formation model, flame kernel development model and natural gas single step reaction model, are used to analyze the contribution of cyclic equivalence ratio variations to cyclic variations in the compressed natural gas （CNG） lean burn spark ignition engine. Computational results including the contributions of equivalence ratio cyclic variations to each combustion stage and effects of engine speed to the extent of combustion variations are discussed. It is concluded that the equivalence ratio variations affect mostly the main stage of combustion and hardly influence initial kernel development stage.Three-dimensional models, consisting of the flame kernel formation model, flame kernel development model and natural gas single step reaction model, are used to analyze the contribution of cyclic equivalence ratio variations to cyclic variations in the compressed natural gas （CNG） lean burn spark ignition engine. Computational results including the contributions of equivalence ratio cyclic variations to each combustion stage and effects of engine speed to the extent of combustion variations are discussed. It is concluded that the equivalence ratio variations affect mostly the main stage of combustion and hardly influence initial kernel development stage.

关 键 词：three-dimensional model lean burn CNG engine equivalence ratio combustion cyclic variations 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]