氢气微尺度催化燃烧的数值模拟  

NUMERICAL SIMULATION ON CATALYTIC COMBUSTION OF HYDROGEN INSIDE MICRO-SCALED TUBE

作　　者：陈俊杰[1] 王谦[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《太阳能学报》2010年第9期1129-1134,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50576032);江苏省自然科学基金(BK2009201)

摘　　要：通过耦合计算流体力学软件FLUENT和化学反应动力学软件CHEMKIN并采用空间气相和表面催化详细化学反应机理,对氢气和空气的预混合气体在微型管道内的催化燃烧过程进行了数值模拟,讨论了不同反应模型的燃烧特性以及当量比Φ和预混合气体入口速度对催化燃烧反应的影响。计算结果表明:表面催化反应对空间气相反应有抑制作用;当量比Φ对氢气的催化燃烧过程有重要影响;随着入口速度的增大,燃烧过程同时存在表面催化反应和空间气相反应两种控制因素;表面催化反应对空间气相反应的影响能被分成3种类型。计算结果为在微型动力系统中实现催化燃烧以及扩展燃烧极限提供了理论依据。Catalytic combustion of hydrogen/air mixture inside micro-tube was numerically investigated with detailed the gas phase and the surface catalytic chemical reaction mechanisms by using the commercial fluid dynamics code FLUENT coupled with the chemical reaction dynamics subroutine CHEMKIN. Combustion characteristics for different reaction models and the influence of equivalence ratio, inlet velocity of hydrogen/air mixture on surface catalytic combustion reaction were discussed. The Computational results indicated that the surface catalytic combustion restrains the gas phase combustion. Equivalence ratio of hydrogen/air mixture has important influence on catalytic combustion of hydrogen. As the inlet velocity increases, the existence of the surface catalytic combustion and the gas phase combustion has two controlling fac- tors on combustion. The effect of the surface catalytic reaction on the gas phase reaction can be divided to three types. Some theoretical evidences are provided for the application of catalytic combustion to micro-electromechanical system （MEMS） and the extension of the combustion limits.

关 键 词：氢气 微尺度 催化燃烧 数值模拟 燃烧特性 

分 类 号：TK91[动力工程及工程热物理]