对流化床内气泡在床层表面破裂对颗粒分布的影响进行了研究。给出了气泡破裂后抛射颗粒的运动模型。用该模型对二维流化床表面颗粒的运动进行了模拟 ,并对模拟结果进行了讨论 ,表明了颗粒在床层表面的混合对床层内循环具有重要影响 The influence of bubbles in the fluidized bed on the surface of the bed ruptured the particle distribution was studied. The motion model of projectile particles after bubble rupture is given. The model was used to simulate the particle motion on a two-dimensional fluidized bed and the simulation results were discussed. It is shown that the mixing of particles on the bed surface has an important influence on the circulation in the bed