Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Effects of curvature on flame acceleration in micro channels | |
Li, Tao1,2 ; Huo, Jiepeng1,2; Li, Xing1,2,3; Kong, Fanfu4; Wang, Xiaohan1,2; Xu, Baopeng4
| |
| 2022-08-01 | |
| Source Publication | COMBUSTION AND FLAME
 |
| ISSN | 0010-2180 |
| Volume | 242Pages:9 |
| Corresponding Author | Wang, Xiaohan(wangxh@ms.giec.ac.cn) ; Xu, Baopeng(baopengxu@dlut.edu.cn) |
| Abstract | The effects of channel curvature on the flame propagation are examined for premixed flames in micro channels. Previous studies have shown that curved channels can enhance the flame stretching, which can significantly increase the flame propagation speed. In this study, the effect of flame stretching was excluded by the narrow channel limit in order to study the effects of channel curvature on the flame propagation. An asymptotic approach was first extended to include the effects of channel curvature. Accordingly, the two-dimensional problem was reduced to an effective one-dimensional problem with a clear physical meaning of curvature. A parametric study of curvature was then performed to investigate its effects on the flame propagation. It was found that curvature inhibits both the convection and diffusion processes. An increase in the curvature results in a significantly reduced flame thickness and a significantly increased reaction rate. Furthermore, the initial flame propagation speed is smaller in the channel with a larger curvature, but its growth rate is higher under the same ignition condition. With a large channel curvature, the flame has a smaller propagation speed of the steady compressibility-driven flame and a shorter distance to reach the steady state. (C) 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved. |
| Keyword | Flame acceleration Curvature effect Narrow channels Asymptotic approach |
| DOI | 10.1016/j.combustflame.2022.112168 |
| WOS Keyword | PROPAGATION ; DETONATION ; COMPRESSIBILITY |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2018YFB1501500] ; DNL Cooperation Fund, CAS[DNL202006] |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering |
| Funding Organization | National Key R&D Program of China ; DNL Cooperation Fund, CAS |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical |
| WOS ID | WOS:000831314000006 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/36987 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Wang, Xiaohan; Xu, Baopeng |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 4.Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Li, Tao,Huo, Jiepeng,Li, Xing,et al. Effects of curvature on flame acceleration in micro channels[J]. COMBUSTION AND FLAME,2022,242:9. |
| APA | Li, Tao,Huo, Jiepeng,Li, Xing,Kong, Fanfu,Wang, Xiaohan,&Xu, Baopeng.(2022).Effects of curvature on flame acceleration in micro channels.COMBUSTION AND FLAME,242,9. |
| MLA | Li, Tao,et al."Effects of curvature on flame acceleration in micro channels".COMBUSTION AND FLAME 242(2022):9. |
| 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