建立了花瓣形旋流燃烧器的物理模型,采用Fluent软件对不同内二次风切向速度下花瓣形旋流燃烧器出口的流场进行了数值模拟,分析了其回流区特性,并与冷态下的试验结果进行比较.结果表明:花瓣形旋流燃烧器能在瓣峰后形成轴向和径向回流区,径向的对流换热能起到很好的稳燃效果,提高了对低品质煤种的适应性;在一定范围内,切向速度越大,轴向回流区形成越快,但过大的切向速度会使径向回流区的面积减小. The physical model of the petal-shaped swirl burner was established. The flow field at the outlet of the petal-shaped swirler with different internal secondary tangential velocities was numerically simulated by Fluent software. The characteristics of the flow field were analyzed, The results show that the petal-shaped swirling burner can form axial and radial recirculation zone after the peak of the valve flap, and the radial convective heat transfer can have a good steady-burning effect, Low-quality coal adaptability; within a certain range, the greater the tangential velocity, the faster axial recirculation zone formation, but the excessive tangential velocity will make the radial recirculation zone area decreases.