| 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.
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| 发表期刊 | MICROGRAVITY SCIENCE AND TECHNOLOGY
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| 2015-09
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| 卷号 | 27期号:5页码:329-336 |
| ISSN | 0938-0108
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| 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. |
| 关键词 | Flame Spread
Solid Fuel
Confined Space
Microgravity
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| DOI | 10.1007/s12217-015-9419-z
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000366103200003
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| 关键词[WOS] | IGNITION
; ENVIRONMENT
; TRANSITION
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| WOS研究方向 | Engineering
; Thermodynamics
; Mechanics
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| WOS类目 | Engineering, Aerospace
; Thermodynamics
; Mechanics
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| 项目资助者 | This work is funded by the Strategic Pioneer Program on Space Science, Chinese Academy of Sciences, under grant No. XDA04020410.
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| 课题组名称 | NML微重力两相流与燃烧
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| 论文分区 | 二类/Q2
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/58364
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| 专题 | 微重力重点实验室
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| 通讯作者 | Wang, SF (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China. |
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.
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| 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.
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| 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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