采用两相湍流流动的双流体模型 ,对带有中心高速射流的速差射流煤粉燃烧器进行了模拟计算。计算结果表明 ,燃烧器内筒端面与喷口间的距离 x有一最佳值 ,此时的高温回流量达到最大 ,煤粉燃烧的强化效果最好 ;另外 ,在该燃烧器中 ,中心高速射流能够浓缩煤粉 ,但约束煤粉扩展及增加高温烟气回流的作用不明显 ,只能使一次风粉与已回流的高温烟气混合更好 ,温度更均匀 The two-phase turbulent flow model is used to simulate the quick jet jet pulverized coal burner with central high-speed jet. The calculation results show that the distance x between the end face of the combustor inner tube and the nozzle has an optimum value, and the high-temperature return flow reaches the maximum at this time, and the pulverized coal combustion has the best strengthening effect. In addition, in this burner, Concentration of pulverized coal, but the constraints of coal expansion and increase the role of high temperature flue gas backflow is not obvious, only one time the wind powder has been mixed with the return of high temperature flue gas better and more uniform temperature