| Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow | |
Zhu F(朱凤)1 ; Wang SF(王双峰)1,2,3; Lu, Zhanbin4; Wu CJ(吴传嘉)1,3
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| Corresponding Author | Wang, Shuangfeng([email protected]) |
| Source Publication | FIRE SAFETY JOURNAL
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| 2021-10-01 | |
| Volume | 125Pages:8 |
| ISSN | 0379-7112 |
| Abstract | The future generation of inhabited spacecraft will have a significantly different cabin environment from the present ones, characterized by low pressure and elevated oxygen concentration. This new atmosphere and the low-velocity gas flows in microgravity provide distinct conditions for the combustion of the solid materials used, and their influence on material flammability is of particular interest in the fire safety of spacecraft. Experiments have been conducted to investigate the effects of sub-atmospheric pressure and low flow velocity on the opposed flame spread and extinction behaviors over a thick PMMA. A flammability map was constructed that delineates the uniform regime, the flamelet regime, and extinction limits for thick PMMA under sub-atmospheric pressures. The limiting oxygen concentration increases with the reduced ambient pressure at a fixed opposed flow, while the flamelet regime becomes wider. Under low ambient pressure, the flame spread rate increases with the flow velocity, but the increasing rate slows down. At a constant oxygen concentration, the flame spread rate increases with the ambient pressure and gas-phase conduction dominates flame spread. At a constant oxygen partial pressure, the higher ignition temperature and less gas-phase conduction reduce the flame spread rate synchronously with the increased pressure. |
| Keyword | Sub-atmospheric pressure Low-velocity flow Flame spread Solid Flammability |
| DOI | 10.1016/j.firesaf.2021.103430 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000703825100001 |
| WOS Keyword | DIFFUSION FLAME ; MICROGRAVITY ; COMBUSTION |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Civil ; Materials Science, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China[U1738117] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA04020410] ; Opening Fund of State Key Laboratory of Fire Sci-ence (SKLFS)[HZ2021-KF12] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Opening Fund of State Key Laboratory of Fire Sci-ence (SKLFS) |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Wang, Shuangfeng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87529 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China; 2.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Shanghai Univ, Inst Appl Math & Mech, Shanghai 200072, Peoples R China |
| Recommended Citation GB/T 7714 | Zhu F,Wang SF,Lu, Zhanbin,et al. Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow[J]. FIRE SAFETY JOURNAL,2021,125:8.Rp_Au:Wang, Shuangfeng |
| APA | 朱凤,王双峰,Lu, Zhanbin,&吴传嘉.(2021).Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow.FIRE SAFETY JOURNAL,125,8. |
| MLA | 朱凤,et al."Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow".FIRE SAFETY JOURNAL 125(2021):8. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2021F374.pdf（3999KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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