【开缝钝体燃烧器的工业应用及回流区分级着火机理研究】马晓茜.pdf
THEINDUSTRIALAPPLICATIONOFBURNERWITH SLITTINGBLUFF-BODYANDTHEINVESTIGATION FORMECHANISMOFSTEPPEDIGNITIONIN RECIRCULATIONZONE By MaXiaoqian Supervisedbyprof.QianRenzhang ADissertation SubmittedtotheDegree EvaluatingCommitteeof Huazhong UniversityofScienceand Technolegyin PartialFulfillmentofthe Requi
ABSTRACT The stability ofpulverized coal flameis an important subject in the field of combustions research and technology.The practice show that using flameholder and adjusting combustion working conditions optimally canmake the power plantboiler self-sustained combustin low burden,and alsomake th
缝宽与通道宽之比b/B 缝宽与钝体边宽之比b/2b 入中缝射流湍流态判别准则数 燃气火焰稳定性判别准则数 FzFz数,即煤焦着火和火焰稳定判别数 主要符号说明 T温度k或C t温度k或C U风速m/s R.雷诺数 C。比热kJ/kgC p密度kg/m 空气量kg或mol 燃烧器喷口宽mm 钝体或开缝钝体半边宽mm 开缝钝体缝宽mm 煤粉浓度kg/kg CD、C阻力系数 煤粒径um 燃料量kg或mol 动量kgm/s 燃烧器喷口高mm 理论空气量kg/kg 回流区长度mm 分子量 氧气量kg或mol 压力pa 热量KW 风率 下标 min最大值,max最上值 k颗粒y烟气 注:其它符号见各章中