Particle distribution in the cross-section of the flighted rotating drum (FRD) is critical to the analysis of heat and mass transfer between gas and solids. In this work, the particle tracking velocimetry (PTV) method is applied to study the influence of the number of flights on the particle motion in FRDs. The drum, installed with 1, 4, 8, or 12 rectangular flights, is filled with plastic balls to 15% and operated at various rotating speeds ranging from 10 rpm to 30 rpm. The results show that the number of flights has different effects on the holdup ratio and cascading rate of single flight and active flights. With 8 and 12 flights, the FRD produces a larger and more stable particle ratio of the dilute phase. Moreover, DEM simulations agree with PTV measurements, whereas literature models show significant deviations.

旋转滚筒（FRD）横截面中的颗粒分布对于分析气体和固体之间的热量和质量传递至关重要。在这项工作中，应用粒子跟踪测速（PTV）方法来研究飞行次数对FRD中粒子运动的影响。装有1、4、8或12个矩形刮板的滚筒上装有15％的塑料球，并以10 rpm至30 rpm的各种转速运行。结果表明，飞行次数对单次飞行和主动飞行的保持率和级联率有不同的影响。通过8和12次飞行，FRD产生了更大且更稳定的稀相颗粒比。此外，DEM模拟与PTV测量结果一致，而文献模型显示出明显的偏差。