DDPM simulation of the erosion of immersed tubes in a pulsating fluidized bed

被引：3
|
作者：
Xu, Liuyun [1 ,2 ]
Wu, Feng [1 ]
Wang, Junwu [3 ]
机构：
[1] Northwest Univ, Sch Chem Engn, Xian 710069, Peoples R China
[2] Yanan Univ, Sch Chem & Chem Engn, Yanan 716000, Peoples R China
[3] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2023年 / 269卷
基金：
中国国家自然科学基金;
关键词：
Pulsating flow; Immersed tube erosion; Pressure drop stability; Power spectral density (PSD); SOLID PARTICLE IMPACT; HEAT-TRANSFER; PULSED FLOW; PRESSURE FLUCTUATION; PRACTICAL ESTIMATION; 2-FLUID MODEL; AIR-FLOW; GAS; BEHAVIOR; DAMAGE;
D O I：
10.1016/j.ces.2023.118475
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this study, the effects of the type of pulsating inlet waveform, pulsation frequency, and pulsation amplitude on the stability of fluidized beds and the erosion of immersed tubes were investigated by numerical simulation. Compared with rectangular and triangular inlet flows, sinusoidal flow induced the lowest immersed-tube erosion rate and pressure-drop fluctuation in the fluidized bed. Furthermore, under sinusoidal flow with a pulsation frequency of 1 Hz and pulsation amplitude of 0.25um, the immersed-tube erosion rate was lower by 1.8 %, standard deviation of pressure drop by 14.16 %, and energy generated from bubble rupture by 47.83 % than those under uniform flow. A dimen-sionless parameter vp that can represent immersed-tube erosion during pulsating flow was proposed, which reflects the effect of particle flow characteristics, particle fluidization degree, and pulsation fre-quency on immersed-tube erosion.CO 2023 Elsevier Ltd. All rights reserved.
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页数：13
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