Flow characteristics of pneumatic conveying of stiff shotcrete based on CFD-DEM method

被引：40

作者：

Chen, Lianjun ^{[1
,3
,4
]}

Sun, Zhenjiao ^{[1
]}

Ma, Hui ^{[2
]}

Pan, Gang ^{[1
]}

Li, Pengcheng ^{[1
]}

Gao, Kang ^{[1
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Peoples R China

[2] Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Peoples R China

[3] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofou, Minist Sci & Technol, Qingdao 266590, Peoples R China

[4] Shandong Univ Sci & Technol, Natl Demonstrat Ctr Expt Min Engn Educ, Qingdao 266590, Peoples R China

来源：

POWDER TECHNOLOGY | 2022年 / 397卷

基金：

中国国家自然科学基金;

关键词：

Stiff shotcrete; Pneumatic conveying; Elbow; CFD-DEM; Gas-solid ratio; GAS-SOLID FLOW; RHEOLOGICAL PROPERTIES; SIMULATION; PIPE; PRESSURE; CONTACT; PARTICLES; CONCRETE; BEHAVIOR; EROSION;

D O I：

10.1016/j.powtec.2022.117109

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

To reveal the flow characteristics of materials in the pneumatic transportation of stiff shotcrete, based on the CFDDEM coupling simulation method, the numerical simulation of gas-solid flow of stiff shotcrete materials in the pipeline transportation process was carried out. The discrete element simulation parameters of stiff shotcrete are obtained by parameter calibration. In addition, the accuracy of the simulation results is proved by field experiments. The results show that the pressure drop area in the acceleration section is 2 m before the initial stage of pneumatic conveying. With the increase of gas velocity and feed rate, the unit pressure drop increases, and the most worn area position at the elbow is always about 30 degrees. The linear relationship between unit pressure drop and gas-solid ratio is obtained. This paper can provide reference and optimization for the research of longdistance pneumatic conveying system of stiff shotcrete materials. (c) 2022 Elsevier B.V. All rights reserved.

引用

页数：14

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