Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow

doi:10.1016/j.firesaf.2021.103430

	Opposed flame spread over thick solid fuels under influence of sub-atmospheric pressure and low-velocity flow
	Zhu F(朱凤)4; Wang SF(王双峰)2,3,4; Lu, Zhanbin 1; Wu CJ(吴传嘉)2,4
刊名	FIRE SAFETY JOURNAL
	2021-10-01
卷号	125 页码:8
关键词	Sub-atmospheric pressure Low-velocity flow Flame spread Solid Flammability
ISSN号	0379-7112
DOI	10.1016/j.firesaf.2021.103430
通讯作者	Wang, Shuangfeng(sfwang@imech.ac.cn)
英文摘要	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.
分类号	二类
资助项目	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]
WOS关键词	DIFFUSION FLAME ; MICROGRAVITY ; COMBUSTION
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000703825100001
资助机构	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)
其他责任者	Wang, Shuangfeng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87528]
专题	力学研究所_国家微重力实验室
作者单位	1.Shanghai Univ, Inst Appl Math & Mech, Shanghai 200072, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China;
推荐引用方式 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.
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.