不同催化面形状对微通道内气相燃烧的影响  

Effect of Different Shapes of Catalytic Surface on Homogeneous Reaction in Micro Combustor

作　　者：卢青波[1] 潘剑锋[1] 邵霞[1] 查正乾 Lu Qingbo;Pan Jianfeng;Shao Xia;Zha Zhengqian(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工程学院,镇江212013

出　　处：《燃烧科学与技术》2018年第1期27-33,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51376082;51676088);江苏省普通高校研究生科研创新计划资助项目(KYLX16_0891)

摘　　要：基于空间气相和表面催化的详细化学反应机理,应用计算流体动力学软件对亚毫米催化燃烧室内的氢氧预混合燃烧进行数值模拟,获得了催化燃烧的燃烧特性,以及催化面积相同而催化面形状不同条件下表面催化反应对空间气相燃烧特性的影响.结果表明:催化燃烧能明显提高燃烧转化率,改善燃烧室性能;表面催化反应会与气相反应竞争反应物,从而抑制气相反应的发生;表面催化反应生成的热量提高了壁面的温度,增大了燃烧室的热量损失;相同催化面积下,采用三角形催化面的燃烧室性能最佳.Hetero-/homogeneous combustion of hydrogen-oxygen mixture in a platinum-coated micro channel was studied by means of three-dimensional(3D)computational fluid dynamics(CFD)model using detailed chemical reaction mechanisms for homogeneous(gas phase)and heterogeneous(catalytic)reactions.The hetero-/homogeneous reaction characteristics and the effect of heterogeneous reaction on homogeneous reaction with different shapes but the same area of catalytic surface were discussed.The results show that the presence of heterogeneous reaction can significantly enhance the combustion conversion rate and improve the performance of the combustor.A competition for reactants between heterogeneous reaction and homogeneous reaction can suppress the homogeneous reaction.The wall temperature is enhanced via the exothermicity of heterogeneous reaction,and the heat loss of the combustor is increased.The performance of the combustor with the triangular catalytic surface is the best when the area of catalytic surface is the same.

关 键 词：微尺度燃烧 表面催化反应 空间气相反应 催化面形状 

分 类 号：TK50[动力工程及工程热物理—热能工程]