乙炔/空气层流预混火焰中氢气添加对碳烟颗粒生成的影响  

Influence of hydrogen addition on soot formation in laminar acetylene/air premixed flames

作　　者：魏明锐[1,2] 李松[1,2] 刘近平[1,2] 彭飞[1,2] WEI Mingrui LI Song LIU Jinping PENG Fei(Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,湖北武汉430070

出　　处：《中南大学学报（自然科学版）》2016年第12期4255-4262,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51276132);中央高校基本科研业务费专项资金资助项目(145207002)~~

摘　　要：构建一维常压稳态层流预混火焰中碳烟颗粒动力学演化过程的数学模型,采用内插值的矩方法对该数学模型进行数值求解,并与含有碳烟前驱物的化学反应机理进行耦合,基于Fortran语言,建立碳烟生长演化的数值计算模型,在此基础上,分析乙炔/空气层流预混火焰中氢气添加对碳烟颗粒生成的影响。研究结果表明:氢气的添加可以通过改变火焰温度、稀释效应以及化学反应抑制作用来改变碳烟形成过程中的化学反应及颗粒动力学事件,从而减缓火焰中PAHs生长,降低碳烟颗粒的成核率、凝并率和表面生长率,对碳烟颗粒的生长起到了一定抑制作用。The mathematical model of soot dynamical process was built in laminar one-dimensional premixed flames, and the interpolated method of moments was used to solve the mathematical model coupled with the detailed chemical kinetic model with the soot precursors. The computation platform was established based on Fortran language, and the effect of hydrogen addition on soot formation in laminar acetylene/air premixed flames was investigated by numerical simulation. The results show that the addition of hydrogen to the C2H2/air premixed flames can slow down the formation of PAHs, inhibit particles nucleation rate, coagulation rate and surface growth rate due to the thermal effect, dilution effect and direct chemically inhibiting effect, which finally decreases the soot formation.

关 键 词：层流预混火焰 碳烟颗粒 矩方法 乙炔 氢气 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]