| Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow | |
Zhu F(朱凤) ; Huang, Xinyan; Chen, Xiao; Wang SF(王双峰)
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| Corresponding Author | Huang, Xinyan([email protected]) ; Wang, Shuangfeng([email protected]) |
| Source Publication | FIRE TECHNOLOGY
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| 2023-01-27 | |
| Pages | 19 |
| ISSN | 0015-2684 |
| Abstract | The flame behaviors in a narrow gap with low-velocity airflow are significantly different from buoyancy-controlled flames in open areas. The conditions experienced by microgravity flame may be reproduced in a narrow gap environment where the buoyancy is limited. This work studies the behaviors of near-limit concurrent flame spread over a thick solid fuel in an oxygen-limited narrow channel with 3 mm and 5 mm heights. As the concurrent airflow and oxygen concentration decrease below a critical value, the flame spread transitions to the fuel-regression mode, burning like a candle flame. Further reducing the oxygen, the flame tip tilts towards the inflow like the flame in the opposed flow. A flammability map is found to define three regimes (1) concurrent flame spread, (2) fuel regression, and (3) extinction. The fuel-regression regime is characterized by a fuel regression angle of over 30 degrees and a global flame equivalence ratio of over 1.9. The existence of the fuel-regression mode extends the low-flow flammability limit in the concurrent flow. The 'round-trip' flame phenomenon is observed where the 1st-stage near-limit opposed flame spread transitions to the 2nd-stage fuel regression in the concurrent flow. This work provides new insights into the concurrent flame-spread and extinction behavior under oxygen-limited and microgravity environments. |
| Keyword | Fire spread Near-limit Fuel regression Flammability Flamelet Thick PMMA |
| DOI | 10.1007/s10694-023-01369-9 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000918561500001 |
| WOS Keyword | PMMA ROD ; MICROGRAVITY ; MECHANISMS |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| Funding Project | National Key R&D Program of China[2021YFA0716203] ; Opening Fund of State Key Laboratory of Fire Science (SKLFS)[HZ2021-KF12] ; National Natural Science Foundation of China[U1738117] |
| Funding Organization | National Key R&D Program of China ; Opening Fund of State Key Laboratory of Fire Science (SKLFS) ; National Natural Science Foundation of China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Huang, Xinyan ; Wang, Shuangfeng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91538 |
| Collection | 微重力重点实验室 |
| Recommended Citation GB/T 7714 | Zhu F,Huang, Xinyan,Chen, Xiao,et al. Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow[J]. FIRE TECHNOLOGY,2023:19.Rp_Au:Huang, Xinyan, Wang, Shuangfeng |
| APA | 朱凤,Huang, Xinyan,Chen, Xiao,&王双峰.(2023).Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow.FIRE TECHNOLOGY,19. |
| MLA | 朱凤,et al."Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow".FIRE TECHNOLOGY (2023):19. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2023A258.pdf（1987KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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