均质压燃发动机燃烧特性的详细反应动力学模拟

应用CHEMKIN化学动力学软件包中的SENKIN模块模拟了正庚烷在HCCI发动机中的燃烧过程。通过修改SENKIN程序,加入了Woschni传热模型,并在正庚烷详细氧化机理中加入氮氧化物的生成机理,将此程序纳入发动机燃烧的零维单区模型。对多种工况参数下的HCCI燃烧和NOx排放进行了系统的计算,并分别讨论了进气温度、进气压力、压缩比、过量空气系数和转速等参数变化对HCCI发动机燃烧过程的影响。

The Simulation of HCCI Engine Combustion Using Detailed Chemical Kinetics Model

The paper has used the SENKIN code of CHEMKIN chemical kinetics package to simulate the combustion process of HCCI (homogeneous charge compression ignition) engines fueled with n-heptane.The SENKIN code has been modified to incorporate the Woschni heat transfer correlation and a detailed chemistry mechanism of NO_x formation was coupled with the detailed chemical kinetics mechanism of n-heptane and was applied to the zero-dimensional single-zone model of engine combustion.The HCCI combustion and NO_x emissions have been calculated systemically under different parameters,and the influences of the intake temperature,the intake pressure,the compression ratio,the equivalence ratio and the engine speed on combustion process of the HCCI engine were discussed.