焦炉气同轴射流自由扩散火焰的特性  

Properties of Co-Axial Jet Free Diffusion Flame of Coke Oven Gas

作　　者：程宏[1] 代正华[1] 王玉琴[1] 郭庆华[1] 梁钦锋[1] 王辅臣[1] 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《燃烧科学与技术》2010年第6期560-564,共5页Journal of Combustion Science and Technology

基　　金：国家科技支撑计划资助项目(2006BAE02B02);国家重点基础研究发展计划(973)资助项目(2010CB227000);上海市优秀学科带头人计划资助项目(08XD1401300)

摘　　要：以焦炉气为燃料,纯氧气为氧化剂,采用双通道烧嘴在不同的射流速度下于敞开空间中进行垂直自由扩散燃烧,考察了Fr数、Re数对火焰长度的影响,以及焦炉气射流速度与火焰脱火高度的关系.实验表明,火焰由浮力控制区向动量控制区转变时的Fr数约为197,由层流区向湍流区转变时的Re数约为16 000;火焰发生脱火的临界速度约为20 m/s.Coke oven gas（COG） and pure oxygen are used as fuel and oxidant respectively,and at different jet ve-locities,they were combusted in a vertical jet shooting downward from a co-axial double channel burner.The pa-rameters,such as Froude number（Fr） and Reynolds number（Re）,which affect flame length and the relation be-tween flame lift off height and COG jet velocities,were investigated.The experimental results showed that Fr was about 197 when flame was converted from buoyancy-dominated regimes to momentum-dominated regimes,and Re was about 16 000 when it was converted from laminar area to turbulent area;the COG critical jet velocity was about 20 m/s when flame base was lifted.

关 键 词：焦炉气 同轴射流 扩散火焰 火焰长度 脱火高度 

分 类 号：O643.2[理学—物理化学]