ZHANG Xiaoyi, LIU Bo, LIU Zhenye, LI Donghui

(College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)

Abstract: Physical and mathematical models of gas-solid two-phase flow in the feeder pipeline were established. The discrete phase model (DPM) in Fluent 2020 R2 software was used to simulate the temperature field, pressure flow field and particle distribution in feeder pipeline. A pneumatic mixer test platform was built to test and verify the pressure. The effect of temperature field on particle distribution in feeder was studied by comparing the simulation results with and without temperature field. The results show that the initial temperature of gas phase and particle phase is different in feeder pipeline, and the temperature gradually tends to be the same after the heat exchange between gas and solid phase flow. The absolute pressure drop in pipeline with the influence of temperature field considered is greater than that without the influence of temperature field, and the error between measured value and experimental value is only about 16%. At the outlet section of both sides of pipeline, with the increase of Z-axis distance, the distribution of particle mass concentration gradually changes from low in the center of the circular section of the pipeline and high in the wall surface to approximately uniform distribution on the entire circular section of the pipeline. Compared with the condition without considering the influence of temperature, the particle mass concentration at the center of the circular cross section of pipeline decreases by 3.0%～8.7% and the Z-axis distance required to form a stable and uniform particle mass concentration distribution on the circular cross section of pipeline is longer when considering the influence of temperature field.

Keywords: feeder pipeline； particle distribution； gas-solid two-phase flow； descrete phase model; temperature field； pressure flow field

中图分类号：TQ022

文献标志码：A

文章编号：1008-5548(2021)04-0093-11

DOI:10.13732/j.issn.1008-5548.2021.04.012

收稿日期： 2020-12-11， 修回日期：2021-03-19，在线出版时间：2021-06-03 13:47。

基金项目：国家重点研发计划项目，编号：2018YFB2001300。

第一作者简介：张晓仪(1996—)，男，硕士研究生，研究方向为两相流流动特性。E-mail：zhangrhm@163.com。

通信作者简介：柳波(1968—)，男，博士，副教授，硕士生导师，研究方向为气力输送技术。E-mail：liuboyh@126.com。