摘要：为了研究水平管道旋转对堵塞坍塌的影响,加快流动堵塞坍塌,采用计算流体力学(CFD)与离散单元法(DEM)耦合的方法,在旋转速度为0、150、300、450、600 r/min时,模拟气力输送过程中流动堵塞坍塌过程,并研究旋转速度对水平管道中流场特性的影响。结果表明:堵塞流两极分化,颗粒群扰动性增强,运动复杂。管道旋转能够加快堵塞坍塌,但综合坍塌效果与转动能耗,最佳转速应保持在150～300 r/min之间。

关键词：水平管道；管道旋转；堵塞坍塌；离散单元法

Abstract: In order to study the influence of horizontal pipeline rotation on flow blockage collapse and speed up flow blockage collapse，the model of coupling computational fluid dynamics ( CFD) and discrete element method ( DEM) was adopted to simulate flow blockage collapse in the pneumatic conveying process at 5 rotational speeds ( 0，150，300，450 and 600 r/min) ． The effect of rotational speed on flow field characteristics in horizontal pipe was studied． The results show that the blockage flow is polarized，the perturbation of particle groups is enhanced，and the motion is complex． Pipe rotation can accelerate the blockage collapse，but the optimal speed should be kept between 150 and 300 r/min based on the comprehensive collapse effect and rotational energy consumption．

Keywords: horizontal pipeline; pipe rotation; flow blockage collapse; discrete element method