微尺度催化燃烧过程中传质准则数分析  

Analysis of the Criterion Number of Mass Transfer in the Micro-scale Catalytic Combustion Process

作　　者：周俊[1] 潘剑锋[1] 卢青波[1] 唐爱坤[1] 邵霞[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《小型内燃机与摩托车》2012年第6期39-42,共4页Small Internal Combustion Engine and Motorcycle

基　　金：国家自然科学基金资助项目(50706016);江苏省六大人才高峰第八批资助项目(装备制造201127);江苏省高校优势学科建设工程资助项目和江苏大学"拔尖人才培养工程"资助项目

摘　　要：在微尺度燃烧过程中,由于在很小的范围内各种中间组分和燃烧产物的传质和传热过程以及化学反应过程相耦合,因此微燃烧室内部的对流传质问题比较复杂。基于金属Pt壁面催化微燃烧室的模拟结果,分析了燃烧化学反应过程中组分OH的浓度梯度、传质和流动过程的计算结果,并结合无量纲分析法,推导出传质准则数舍伍德数Sh的数学表达式,通过OH的截面平均Shx去表征微燃烧过程中空间气相反应的变化,并分析入口参数对Shx的影响及空间气相反应与表面催化反应之间的抑制作用。In the micro-scale conditions,due to the mass transfer and heat transfer coupling with the combustion process within the micro-combustor,the convection and mass transfer in the micro-combustor are rather complicated issues.In this paper,based on the simulation results of the Pt-based micro-scale catalytic combustion process and the concentration gradient,mass transfer and flow of the OH components in the micro-combustor,dimensionless analysis method was used to calculate the dimensionless Shx number which described the space gas phase reaction and mass transfer intensity in the channel cross-section away from the entrance at x.Then effects of inlet parameters on the dimensionless Shx number and the inhibition between the space gas phase reaction and catalytic reaction were analyzed.

关 键 词：微尺度催化燃烧 对流传质 无量纲分析 传质准则数 

分 类 号：TK5[动力工程及工程热物理—热能工程]