Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow
文献类型：期刊论文
| 作者 | Zhu F(朱凤) ; Huang, Xinyan; Chen, Xiao; Wang SF(王双峰)
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| 刊名 | FIRE TECHNOLOGY
 |
| 出版日期 | 2023-01-27 |
| 页码 | 19 |
| 关键词 | Fire spread Near-limit Fuel regression Flammability Flamelet Thick PMMA |
| ISSN号 | 0015-2684 |
| DOI | 10.1007/s10694-023-01369-9 |
| 通讯作者 | Huang, Xinyan(xy.huang@polyu.edu.hk) ; Wang, Shuangfeng(sfwang@imech.ac.cn) |
| 英文摘要 | 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. |
| 分类号 | 二类 |
| WOS关键词 | PMMA ROD ; MICROGRAVITY ; MECHANISMS |
| 资助项目 | 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] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000918561500001 |
| 资助机构 | National Key R&D Program of China ; Opening Fund of State Key Laboratory of Fire Science (SKLFS) ; National Natural Science Foundation of China |
| 其他责任者 | Huang, Xinyan ; Wang, Shuangfeng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91537]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 推荐引用方式 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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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