正庚烷掺烧甲醇时炭烟和PAHs生成的数值模拟  

Numerical Simulation of Soot and PAHs Formation in n-Heptane/Methanol Combustion

作　　者：熊军华[1] 王洪夫[1] 姜水生[1] 文梦林[1] 邓志明[2] 

机构地区：[1]南昌大学机电工程学院动力系,江西南昌330031 [2]海军蚌埠士官学校机电系,安徽蚌埠230012

出　　处：《车用发动机》2013年第1期15-19,共5页Vehicle Engine

基　　金：国家自然科学基金资助项目(50906038)

摘　　要：利用Chemkin—Pro软件中的均质压燃模型,采用正庚烷详细化学动力学机理和炭烟生成氧化机理,模拟了甲醇对正庚烷燃烧时炭烟生成的影响。模拟结果表明:随着甲醇含量的增加,炭烟生成量减少,炭烟颗粒直径变小;掺入少量甲醇时,炭烟颗粒平均直径明显变小;当含甲醇量达到15%时,平均颗粒直径稍有变小;正庚烷中加入甲醇后,燃料中含氧量增加,有更多的炭烟气态前驱物和PAH被氧化,从而抑制了炭烟的生成。With the HCCI model of Chemkin-Pro software, the influence of methanol on soot formation in n-heptane combustion was simulated based on the n-heptane detailed chemical kinetic mechanism and soot oxidation mechanism. The results show that, with the increase of methanol content, the soot reduces and its diameter decreases. Mixing with a little methanol, the soot mean diameter obviously decreases. The methanol content reaches 15 %, the soot mean diameter slightly decreases. Mixing with methanol, the oxygen content of n-heptane fuel increases, more soot gaseous precursors and PAH are oxidized and thereby the soot is suppressed.

关 键 词：甲醇 正庚烷 炭烟 数值模拟 化学动力学 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]