Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment

doi:10.1007/s10694-019-00896-8

IMECH-IR > 微重力重点实验室

	Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment
	Wu CJ(吴传嘉)2 ; Wang SF(王双峰)1,2 ; Zhu F(朱凤)1,2 ; Huang XY 3; Yin YL 4
通讯作者	Wang, Shuangfeng(sfwang@imech.ac.cn)
发表期刊	FIRE TECHNOLOGY
	2020
卷号	56 期号:1 页码:71-89
ISSN	0015-2684
摘要	The enriched oxygen ambient may be applied to China's next generation space station. To understand the fire behaviors under oxygen-enriched microgravity environment, flame-spread experiments on extruded poly(methyl)methacrylate (PMMA) rods with 10-mm diameter were conducted in the SJ-10 Satellite. The opposed flame-spread behaviors were studied at the oxygen-enriched ambient (33.5% and 49.4%) under low flow velocities in the range of 0 to 12 cm/s. After the ignition in the middle of the sample, an opposed flame spread was achieved, rather than the forward flame spread. The flame-spread rate increases with the opposed flow velocity, due to the decreased flame width and the enhanced flame heat flux. Moreover, a blue flame sheet with a frequent burst of bubbles is found throughout the opposed-flow spread process, showing a near extinction behavior. For the oxygen concentration above 25%, normal-gravity experiments suggest that whether PMMA is cast or extruded should have a negligible effect on the opposed flame spread in microgravity. Compared to normal gravity, the microgravity flame spread rate in the oxygen-enriched atmosphere is slower which is the order of 0.1 mm/s, only one-tenth to one-fifth of that in normal gravity at the same nominal opposed flow velocity, and the acceleration of flame spread in microgravity by increasing oxygen concentration is also much smaller. This result suggests that (1) if the environmental gas flow is small, the fire hazard increased by raising oxygen level in microgravity space cabin can be much smaller than that on Earth; and (2) the fire risk of oxygen-enriched microgravity environment might be overestimated when a ground-based test method is employed to evaluate the burning characteristics of solid material.
关键词	Spacecraft fire safety Blue flame Cast and extruded PMMA Thermally-thick fuel Extinction
DOI	10.1007/s10694-019-00896-8
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000512076800005
关键词[WOS]	DIFFUSION FLAME ; FUEL ; FLOW ; COMBUSTION ; BOUNDARY ; VELOCITY ; WIRE ; SOOT
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
论文分区	Q3
力学所作者排名	1
RpAuthor	Wang, Shuangfeng
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81521
专题	微重力重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China; 3.Hong Kong Polytech Univ, Res Ctr Fire Engn, Kowloon, Hong Kong, Peoples R China; 4.China Astronaut Res & Training Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wu CJ,Wang SF,Zhu F,et al. Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment[J]. FIRE TECHNOLOGY,2020,56,1,:71-89.
APA	吴传嘉,王双峰,朱凤,Huang XY,&Yin YL.(2020).Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment.FIRE TECHNOLOGY,56(1),71-89.
MLA	吴传嘉,et al."Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment".FIRE TECHNOLOGY 56.1(2020):71-89.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Jp2020042.pdf（7249KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载