FENG Shaohua, JIA Wenguang

(College of Electromechanical Engineering, Qingdao University of Science & Technology, Qingdao 266061, China)

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

文章编号：1008-5548(2020)06-0037-08

DOI:10.13732/j.issn.1008-5548.2020.06.005

收稿日期： 2020-05-17， 修回日期：2020-05-26，在线出版时间：2020-09-11 07:22。

基金项目：山东省自然科学基金项目，编号：ZR2019BEE014。

第一作者简介：冯少华(1999—)，男，研究方向为流动堵塞坍塌机理与机制。E-mail:fengshaohua408@163.com。

通信作者简介：贾文广(1984—)，男，博士，硕士生导师，研究方向为密相气力输送机理。E-mail:jwgqust@163.com。

中图分类号：TQ317; TQ022                           文献标志码：A