内置隔板对微通道内CH_4/air预混燃烧特性的影响  

Effect of partitions on premixed CH_4/air combustion characteristics in micro channels

作　　者：潘剑锋[1] 查正乾 卢青波[1] 邵霞[1] 卢志刚 PAN Jianfeng;ZHA Zhengqian;LU Qingbo;SHAO Xia;LU Zhigang(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

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：《江苏大学学报（自然科学版）》2018年第4期373-376,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51376082);江苏省高校优势学科建设工程项目

摘　　要：在微尺度燃烧室内布置隔板会引起内部流场和热传递的变化,为分析其对内部燃烧过程的影响,采用CH_4/air预混气进行预混合燃烧试验,对有无隔板2种情况下的着火界限和外壁面温度进行了测试.结果表明:相同CH_4流量下,由于散热量增大,隔板的增加会增大火焰进入通道时的空气量;隔板布置在出口时火焰更容易在燃烧室内传播,且在小流量下火焰的稳定性更好;隔板分割出的通道宽度为2 mm时,在所有当量比下均不能燃烧,隔板间距为4 mm的燃烧室内,火焰的稳定性较好;与采用不锈钢材料对比,采用Pt作为隔板材料能拓宽燃烧室的可燃界限、提高燃烧室外壁面上温度分布的均匀性.In micro combustion chamber, the partitions can lead to the changes of flow field distribution and heat transfer. To analyze the effect of partitions on the premixed combustion process, the flammability limits of premixed CH4/air and the temperature distribution on the outer wall surface of micro combustor with or without partitions were investigated. The experimental results show that the input amount of air is increased by adding partitions when the flame enters the combustor at the same flow rate due to heat loss. The flame spreads more easily in the combustor when the partitions are spaced in the outlet, and the mixture cannot be burned in the 2-mm-width channels divided by partitions under any equivalence ratio. The flame stability is good in the combustor with 4-mm-distance partitions. Compared with stainless steel, using Pt as partition material can broaden the flammability limits and improve the uniformity of temperature distribution.

关 键 词：隔板 微燃烧 预混燃烧 可燃界限 当量比 

分 类 号：TK05[动力工程及工程热物理]