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采用标准k-ε湍流模型和颗粒轨道模型模拟了水平撞击流反应器内的气相流场和颗粒运动,实验采用压力计和PV4A光纤速度测量仪测量了整体压力损失和颗粒沿喷嘴轴线的速度变化,模拟得到的规律和实验结果基本吻合。通过模拟还得到了单侧颗粒进料时的颗粒运动特征、颗粒的最大渗透深度和平均飞行时间等信息。结果表明,撞击区域集中在2～3倍喷嘴直径范围之内,气流场的速度和压力呈对称分布,颗粒进入反向气流后速度急剧衰减,最大渗透深度约为喷嘴直径的2倍,颗粒的平均飞行时间在0.7 s～1.8 s之间。随着喷嘴气流速度的增加,颗粒物料更容易被气流带走。
The standard k-ε turbulence model and the particle orbit model were used to simulate the gas flow field and particle movement in the horizontal impinging flow reactor. The pressure drop and PV4A fiber velocity measuring instrument were used to measure the overall pressure loss and the particle velocity variation along the nozzle axis The simulated results agree well with the experimental results. Through the simulation, the particle movement characteristics, the maximum penetration depth of particles and the average flight time of the unilateral pellets were also obtained. The results show that the impact area is concentrated within 2 ~ 3 times of the nozzle diameter. The velocity and pressure of the flow field are symmetrical. The velocity of the particles decreases sharply after entering the reverse air flow. The maximum penetration depth is about 2 times of the nozzle diameter. The average flight time is between 0.7 s ~ 1.8 s. As the nozzle air velocity increases, the particulate material is more easily carried away by the air flow.