摘要
基于CFX软件平台对DRB-4Z型双调风旋流燃烧器的出口流场进行了数值模拟。结果显示:随着内二次风叶片角度的增大,回流区变长,回流直径变小,射流扩展角增大,最大轴向速度和最大切向速度的衰减变慢。随着过渡风速的增大,回流区变小,并且逐渐远离燃烧器喷口。当过渡风速较小时,回流区伸入燃烧器喷口;当过渡风速过大时,回流区大大减小,火炬刚性减弱。
The outlet flow field of DRB-4Z type dual channel swirl burner was computed on the CFX software flat. The results show that the recirculation zone become longer, the diameter of the recirculation zone become smaller and the flow divergent angle increase with the rising of internal secondary air velocity. Simultaneously, the attenuation of the highest axial velocity and tangential velocity become slower. With the rising of transiting air velocity, the recirculation zone become smaller and far from the burner nozzle. When the transition air velocity is smaller, the recirculation zone reach into the burner nozzle. When the transition air velocity is too large, the recirculation zone decrease greatly and the torch stiffness is weakened.
出处
《电站系统工程》
北大核心
2012年第2期8-11,共4页
Power System Engineering
关键词
燃烧器
数值模拟
内二次风叶片
过渡风速
回流区
burner
numerical simulation
internal secondary air blade
transition air velocity
recirculation zone
