Opposed-flow Flame Spread Over Solid Fuels in Microgravity: the Effect of Confined Spaces

	Opposed-flow Flame Spread Over Solid Fuels in Microgravity: the Effect of Confined Spaces
	Wang SF(王双峰); Hu J; Xiao Y; Ren T; Zhu F
刊名	MICROGRAVITY SCIENCE AND TECHNOLOGY
	2015-09
通讯作者邮箱	sfwang@imech.ac.cn
卷号	27 期号:5 页码:329-336
关键词	Flame spread Solid fuel Confined space Microgravity
ISSN号	0938-0108
通讯作者	Wang, SF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China.
产权排序	[Wang, Shuangfeng; Xiao, Yuan; Zhu, Feng] Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China; [Hu, Jun; Ren, Tan] Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China
中文摘要	Effects of confined spaces on flame spread over thin solid fuels in a low-speed opposing flow is investigated by combined use of microgravity experiments and computations. The flame behaviors are observed to depend strongly on the height of the flow tunnel. In particular, a non-monotonic trend of flame spread rate versus tunnel height is found, with the fastest flame occurring in the 3 cm high tunnel. The flame length and the total heat release rate from the flame also change with tunnel height, and a faster flame has a larger length and a higher heat release rate. The computation analyses indicate that a confined space modifies the flow around the spreading flame. The confinement restricts the thermal expansion and accelerates the flow in the streamwise direction. Above the flame, the flow deflects back from the tunnel wall. This inward flow pushes the flame towards the fuel surface, and increases oxygen transport into the flame. Such a flow modification explains the variations of flame spread rate and flame length with tunnel height. The present results suggest that the confinement effects on flame behavior in microgravity should be accounted to assess accurately the spacecraft fire hazard.
分类号	二类/Q2
类目[WOS]	Engineering, Aerospace ; Thermodynamics ; Mechanics
研究领域[WOS]	Engineering ; Thermodynamics ; Mechanics
关键词[WOS]	IGNITION ; ENVIRONMENT ; TRANSITION
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1007/s12217-015-9419-z
语种	英语
WOS记录号	WOS:000366103200003
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58364]
专题	力学研究所_国家微重力实验室
推荐引用方式 GB/T 7714	Wang SF,Hu J,Xiao Y,et al. Opposed-flow Flame Spread Over Solid Fuels in Microgravity: the Effect of Confined Spaces[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2015,27(5):329-336.
APA	王双峰,Hu J,Xiao Y,Ren T,&Zhu F.(2015).Opposed-flow Flame Spread Over Solid Fuels in Microgravity: the Effect of Confined Spaces.MICROGRAVITY SCIENCE AND TECHNOLOGY,27(5),329-336.
MLA	王双峰,et al."Opposed-flow Flame Spread Over Solid Fuels in Microgravity: the Effect of Confined Spaces".MICROGRAVITY SCIENCE AND TECHNOLOGY 27.5(2015):329-336.