Knowledge Management System Of Institute of process engineering,CAS
| Characterizing regime transitions in a bubble column with internals | |
| Guan, Xiaoping1,2; Yang, Ning1,3 | |
| 2021-01-21 | |
| Source Publication | AICHE JOURNAL
 |
| ISSN | 0001-1541 |
| Pages | 15 |
| Abstract | Effects of internals on flow regimes are systematically investigated in a lab-scale bubble column (BC) through six approaches: total gas holdup, drift-flux, standard deviation, fractal analysis, chaos analysis and wavelet analysis. With increasing internals-covered cross-sectional area (CSA), these methods give various value of the first transitional superficial gas velocity, as different scales of structures are detected to characterize regime transition. While internals are found to have marginal effect on total gas holdup, significant change in gas-holdup structure is discovered, showing a decrease in large-bubbles holdup and an increase in small-bubbles holdup in transitional and churn-turbulent regimes. We propose a novel approach based on wavelet analysis to demarcate the boundaries among micro-, meso-, and macro-scales. The energy fraction of these representative scales identifies two transitional velocities, suggesting that internals advance the advent of first transition and delay the second one. The operating window of transitional regime is, therefore, remarkably extended. |
| Keyword | bubble column flow regime internals pressure fluctuation structures |
| DOI | 10.1002/aic.17167 |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFE0106500] ; National Natural Science Foundation of China[21808222] ; National Natural Science Foundation of China[21925805] ; National Natural Science Foundation of China[91634203] ; National Natural Science Foundation of China[91834303] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| WOS ID | WOS:000609283800001 |
| Publisher | WILEY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/43211 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Yang, Ning |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Innovat Acad Green Mfg, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Guan, Xiaoping,Yang, Ning. Characterizing regime transitions in a bubble column with internals[J]. AICHE JOURNAL,2021:15. |
| APA | Guan, Xiaoping,&Yang, Ning.(2021).Characterizing regime transitions in a bubble column with internals.AICHE JOURNAL,15. |
| MLA | Guan, Xiaoping,et al."Characterizing regime transitions in a bubble column with internals".AICHE JOURNAL (2021):15. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment