CHEN Pan¹，BIAN Caixia¹，CUI Xiaobo¹，WANG Liang¹，YUAN Zhulin²

(1. School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China；2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096，China)

Abstract: Based on the discrete element method, the model of wet particles discharging from a hopper was constructed, and the relationship between the mass flow index (MFI) of a hopper and wet particle friction characteristics, hopper half angle, hopper outlet size and wall friction characteristics were studied. The results were compared with the predicted results of Jenike theory. The results show that wet particle-wall friction coefficient and hopper half angle have great influence on the flow pattern index MFI of the hopper. With the increase of the wall friction coefficient or the hopper half angle, the MFI value decreases, and the flow pattern can be changed from the mass flow to the funnel flow. The results are in agreement with those predicted by Jenike theory, but hopper outlet size, wet particle friction coefficient, Bo number and the dimensionless water content have little effect on the MFI.

Keywords: wet particles；flow pattern；mass flow index；hopper

中图分类号：TK121

文献标志码：A

文章编号：1008-5548(2019)01-0001-06

DOI:10.13732/j.issn.1008-5548.2019.01.001

收稿日期： 2018-09-24，修回日期：2018-10-27，在线出版时间：2018-12-23 07:01。

基金项目：国家自然科学基金青年科学基金项目，编号：51806095；江苏省基础研究计划(自然科学基金)青年基金项目，编号：SBK2018042206；南京工程学院科研基金项目，编号：YKJ201313。

第一作者简介：陈磐(1982—)，女，讲师，博士，研究方向为气、固两相流动数值模拟； E-mail：cp2012@njit.edu.cn。