| 多孔介质发动机详细反应动力学模型 |
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| 引用本文： | 刘宏升,解茂昭.多孔介质发动机详细反应动力学模型[J].东南大学学报,2008,24(4). |
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| 作者姓名： | 刘宏升 解茂昭 |
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| 作者单位： | [1]大连理工大学能源与动力学院,大连116024 [2]大连理工大学海洋能源利用与节能教育部重点实验室,大连116024 |
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| 摘 要： | 应用Chemkin化学动力学软件包中的Senkin模块模拟了正庚烷在多孔介质发动机中的燃烧过程．通过修改Senkin程序，结合了Woschni传热模型和多孔介质换热模型，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．对多种工况参数进行计算，讨论了运行参数对发动机性能的影响．当进气温度、压缩比增大，或过量空气系数降低时，多孔介质发动机着火时刻会明显提前．结果表明：多孔介质对混合气具有预热作用可强化发动机的点火燃烧，多孔介质的初始温度是决定压燃点火的决定性因素．
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| 关 键 词： | 多孔介质（PM）发动机 单区模型 数值模型 |
Simulation of porous medium engine using a detailed chemical kinetics model |
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| Liu Hongsheng,Xie Maozhao.Simulation of porous medium engine using a detailed chemical kinetics model[J].Journal of Southeast University(English Edition),2008,24(4). |
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| Authors: | Liu Hongsheng Xie Maozhao |
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| Abstract: | The Senkin code of the Chemkin chemical kinetics package is used to simulate the combustion process of a porous medium(PM)engine fueled by n-heptane.The code is modified to incorporate the Woschni heat transfer correlation and heat transfer model within a porous medium.A detailed chemistry mechanism of NOx formation is coupled with the detailed chemical kinetics mechanism of n-heptane.The code is applied to a zero-dimensional single-zone model of engine combustion.Influences of operating parameters on the performance of the PM engine are discussed. With the increase in the intake temperature and compression ratio,or with the decrease of the excess air ratio,the ignition timing of the PM engine obviously advances.It is found that the porous medium acting as a heat recuperator can considerably preheat the fuel-air mixture,which promotes the ignition and combustion in the cylinder. And the initial PM temperature is a critical factor controlling the compression ignition of the mixture. |
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| Keywords: | porous medium(PM)engine single-zone model numerical simulation |
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