空气槽对微型Swiss-Roll燃烧器工作特性的影响  

Effects of Air Groove on the Characteristics of a Micro Swiss-Roll Combustor

作　　者：李军伟[1] 钟北京[2] 王建华[2] 魏志军[1] 王宁飞[1] 

机构地区：[1]北京理工大学宇航学院,北京100081 [2]清华大学航天航空学院,北京100084

出　　处：《北京理工大学学报》2010年第2期140-144,共5页Transactions of Beijing Institute of Technology

基　　金：教育部博士点新教师基金项目(200800071020);北京理工大学优秀青年教授资助计划(2008Y0210)

摘　　要：为了解空气槽对平板微型Swiss-roll燃烧器工作特性的影响,采用甲烷-空气预混气,在带有空气槽和没有空气槽的平板Swiss-roll燃烧器中进行燃烧实验,得到了不同甲烷流量时两种燃烧器的熄火极限和壁面温度.结果表明:甲烷-空气预混火焰能够稳定在两种燃烧器的中心;空气槽的存在有助于扩展微燃烧器的可燃极限,使燃烧器在更大的空气过量系数和更小的甲烷流量下工作;有空气槽的燃烧器中心壁面与边缘壁面存在较大的温度梯度,而没有空气槽的燃烧器外壁温度相差不大,更适合作为平面热源.To understand effects of an air groove on the working characteristics of micro Swiss-roll combustors,the combustion of premixed CH4/air was conducted in two micro Swiss-roll combustors,one with an air groove and the other without groove.The results showed that stable combustion of the premixed CH4/air in the combustors can be achieved and the flame is kept in the center of the combustor.The air groove can enlarge the flammable limits of combustor,and make the combustor work at a larger excess air coefficient and a less methane flow rate.There is a large temperature gradient along the radial in the combustor with an air groove.However,for the combustor without an air groove,the outside wall temperature is almost the same,which is more suitable to a plane thermal source.

关 键 词：微小燃烧室 预混燃烧 甲烷 燃烧特性 

分 类 号：TK411.28[动力工程及工程热物理—动力机械及工程]