催化微燃烧室内氢气/空气预混合燃烧特性  

Characteristics of Premixed Combustion of Hydrogen and Air in Catalytic Micro-Combustor

作　　者：潘剑锋[1] 卢志刚 卢青波[1] 张倚[1] 邵霞[1] Pan Jianfeng;Lu Zhigang;Lu Qingbo;Zhang Yi;Shao Xia(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力学院,镇江212013

出　　处：《燃烧科学与技术》2018年第5期383-390,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51376082)

摘　　要：采用实验方法和数值模拟对微尺度催化燃烧室内氢气/空气预混合燃烧过程进行了研究.通过实验对不同工况下燃烧室内的反应类型进行界定,并分析了各反应类型下的燃烧特性.采用氢氧气相反应动力学和表面反应机理进行数值模拟,获得了燃烧室内各组分的变化规律.结果表明:随着当量比的改变,催化燃烧室中的耦合反应与纯表面反应之间会发生相互转变现象,且耦合反应的外壁面温度始终高于纯表面反应的外壁面温度;当燃烧室内发生耦合反应时,燃烧室的壁面温差随当量比的增大而增大,而发生纯表面反应时,随当量比的增大而减小;耦合反应中的气相反应强度随着当量比的增加变得更剧烈,且对表面催化反应的影响更明显;燃烧室内发生耦合反应时的燃料转化率始终高于仅发生纯表面催化反应时的燃料转化率.The combustion process of hydrogen/air mixture in a micro scale catalytic combustor was studied by means of experiments and numerical simulations. The reaction type in combustion chamber under different working conditions was defined experimentally,and the combustion characteristics of different reaction types were analyzed. The change law of each component in the combustion chamber was obtained by using the kinetics of hydrogen and oxygen phase reaction and the surface reaction mechanism in the numerical simulation. The results show that with the change of equivalence ratio,the coupling reaction and the pure surface reaction will change mutually in the catalytic combustion chamber. And the temperature of the outer wall surface under the coupling reaction is always higher than that under the pure surface reaction. The wall temperature difference of the combustion chamber increases with the equivalence ratio when the coupling reaction occurs,while that decreases with the increase of the equivalence ratio under the pure surface reaction. The intensity of gas phase reaction becomes more severe with the increase of equivalence ratio in the coupling reaction,and the effects on the surface catalytic reaction is more obvious. The fuel conversion rate of coupling reaction is always higher than that of pure surface catalytic reaction.

关 键 词：微尺度燃烧 表面催化反应 反应类型 燃烧特性 燃烧效率 

分 类 号：TK45[动力工程及工程热物理—动力机械及工程]