微燃烧器内甲烷催化燃烧的数值模拟  

Numerical Simulation of Catalytic Combustion of CH_4 in a Micro-burner

作　　者：钟北京[1] 洪泽恺[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《热能动力工程》2003年第6期584-588,共5页Journal of Engineering for Thermal Energy and Power

基　　金：教育部博士点基金资助项目 (2 0 0 10 0 0 3 0 67)

摘　　要：联合使用CFD软件、FLUENT和化学反应动力学软件DETCHEM对甲烷 -空气混合物在有逆流换热的微燃烧器内的催化燃烧进行了数值模拟。计算中只考虑了甲烷在催化表面上的反应。燃料 -空气混合物的当量比为 0 .4 ,燃烧器外壁面分别采用等温边界条件和与环境的对流换热边界条件 ,并比较了这两种边界条件对可燃混合气燃烧的影响。计算结果表明 ,催化燃烧可以实现常规方法无法实现的甲烷低温、高效转变。By making use of software CHD FLUENT and chemical reaction dynamics software DETCHEM a numerical simulation was conducted of the catalytic combustion of a mixture of CH_4 and air in a micro-burner featuring counter-flow heat exchange. During the calculations only the reaction of CH_4 on a catalytic surface has been taken into account. The stoichiometric ratio of fuel-air mixture is 0.4. Isothermal boundary condition and ambient convection heat-exchange boundary condition have been adopted for the burner outer wall surface. The impact of these two kinds of boundary condition on the burning of combustible fuel-air mixture was compared. Calculation results show that catalytic combustion has made it possible to realize the low-temperature and high-efficiency conversion of CH_4, which cannot be carried out by a conventional method.

关 键 词：微燃烧器 催化燃烧 数值模拟 甲烷 

分 类 号：O643[理学—物理化学]