| 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)
|
| Corresponding Author | Huang, Xinyan(xy.huang@polyu.edu.hk)
; Wang, Shuangfeng(sfwang@imech.ac.cn)
|
| Source Publication | FIRE TECHNOLOGY
(IF:1.42[JCR-2018],1.397[5-Year]) |
| 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 | 正在获取...
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| Document Type | 期刊论文
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| 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.
|
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