摘要
用热线风速仪测量了ＷＲ型（宽调节比）燃烧器一次风射流的速度分布，Ｖ形稳燃体尾迹回流区的大小，以及边风与一次风组合射流的速度分布。用Ｋ－ε方法进行了数值计算，并将计算结果与实验结果进行了比较，试验和计算结果都表明，Ｉ边／Ｉ１，对射流半速度宽度和射流中心回流区有显著的影响；一次风口中的Ｖ形稳燃体和扩口角对稳定着火和适时补氧有明显的作用。
The velocity profiles of primary air jets and the combination jets of primary air and side air the size of recirculation zone in the wake of V-gutter were measured by using hot wireanemometer on a cool model for WR type burner. The numerically predicted results with K-εtwo-equation model were compared with the experimental data, Both the predicted resultsand the experimental data show that Is/I1 has a considerable effect on the half width of thejet and the size of the central recirculation zone,and the V-gutter and the spread angle of theprimary air nozzle rim are beneficial to the stabilization of the flame and the real-time supplyof oxygen.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1995年第6期65-69,共5页
Journal of Xi'an Jiaotong University
关键词
燃烧器
一次风
回流区
扰动混合特性
湍流
锅炉
burner recirculation zone primary air velocity distribution turbulence mixing characteristics
