Characteristics analysis of gas solid two-phase flow in pneumatic conveying based on CFD-DEM algorithm

被引：0
|
作者：
Yu Y. [1 ]
Shi B. [1 ]
Meng H. [2 ]
Ding P. [1 ]
Yao Y. [1 ]
机构：
[1] School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Liaoning, Shenyang
[2] College of New Energy, China University of Petroleum (East China), Shandong, Qingdao
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2024年 / 43卷 / 03期
关键词：
CFD-DEM coupling method; dilute phase swirl pneumatic conveying; flow characteristic; granular flow; multiphase flow; static mixer;
D O I：
10.16085/j.issn.1000-6613.2023-0353
中图分类号：
学科分类号：
摘要：
Because of its light weight, ultra-light powder particles are easily disturbed by airflow in the process of transportation, and the pipeline pneumatic conveying process of material is unstable and prone to blockage. To study the gas-solid two-phase flow characteristics of ultra-light powder particles in cyclone pneumatic conveying, computational fluid dynamics and discrete element method (CFD-DEM) were used to simulate the gas-solid two-phase flow characteristics in Komax static mixer. It was found that the horizontal pipe with Komax elements can change the particles flow state, and improve the accumulation and uneven distribution of particles. From the analysis of the flow state of particle phase and fluid phase, it was concluded that the element aspect ratio Ar=3 was the preferred geometry structure. Through the range analysis of orthogonal experiments, the order of factors affecting gas-solid two-phase flow characteristics was obtained as follows: conveying gas velocity > particle mass flow rate > particle size. When the element aspect ratio Ar was 3, the collision frequency and strength of particle-particle and particle-wall were negatively correlated. Combining with the dispersion state of the particle flow at the outlet, the optimal conveying gas velocity was 3—4m/s. Considering the influence of conveying gas velocity on pressure drop in the pipeline, the empirical fitting formula of pressure drop, conveying gas velocity and axial position during pneumatic transportation of horizontal pipeline with Komax element was proposed. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：1133 / 1144
页数：11
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