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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; Wang, SF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China.
Source PublicationMICROGRAVITY SCIENCE AND TECHNOLOGY
2015-09
Volume27Issue:5Pages:329-336
ISSN0938-0108
AbstractEffects 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.
KeywordFlame Spread Solid Fuel Confined Space Microgravity
DOI10.1007/s12217-015-9419-z
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000366103200003
WOS KeywordIGNITION ; ENVIRONMENT ; TRANSITION
WOS Research AreaEngineering ; Thermodynamics ; Mechanics
WOS SubjectEngineering, Aerospace ; Thermodynamics ; Mechanics
Funding OrganizationThis work is funded by the Strategic Pioneer Program on Space Science, Chinese Academy of Sciences, under grant No. XDA04020410.
DepartmentNML微重力两相流与燃烧
Classification二类/Q2
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58364
Collection国家微重力实验室
Corresponding AuthorWang, SF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China.
Recommended Citation
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,&Wang, SF .(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.
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