Effect of ambient pressure and radiation reabsorption of atmosphere on the flame spreading over thermally thin combustibles in microgravity
文献类型：期刊论文
| 作者 | Du WF(杜文锋) ; Hu WR(胡文瑞)
|
| 刊名 | SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
 |
| 出版日期 | 2003 |
| 卷号 | 46期号:4页码:381-390 |
| ISSN号 | 1006-9321 |
| 通讯作者 | Du, WF (reprint author), Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Beijing 100080, Peoples R China. |
| 中文摘要 | For the flame spread over thermally thin combustibles in an atmosphere, if the atmosphere cannot emit and absorb the thermal radiation (e.g. for atmosphere Of O-2-N-2), the conductive heat transfer from the flame to the fuel surface dominates the flame spread at lower ambient atmosphere. As the ambient pressure increases, the flame spread rate increases, and the radiant heat transfer from the flame to the fuel surface gradually becomes the dominant driving force for the flame spread. In contrast, if the atmosphere is able to emit and absorb the thermal radiation (e.g. for atmosphere Of O-2-CO2), at lower pressure, the heat transfer from flame to the fuel surface is enhanced by the radiation reabsorption of the atmosphere at the leading edge of the flame, and both conduction and thermal radiation play important roles in the mechanism of flame spread. With the increase in ambient pressure, the oxygen diffuses more quickly from ambient atmosphere into the flame, the chemical reaction in the flame is enhanced, and the flame spread rate increases. When the ambient pressure is greater than a critical value, the thermal radiation from the flame to the solid surface is hampered by the radiation reabsorption of ambient atmosphere with the further increase in ambient pressure. As a result, with the increase in ambient pressure, the flame spread rate decreases and the heat conduction gradually dominates the flame spread over the fuel surface. |
| 学科主题 | 力学 |
| 类目[WOS] | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Materials Science |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000184456000007 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/15783]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Du WF,Hu WR. Effect of ambient pressure and radiation reabsorption of atmosphere on the flame spreading over thermally thin combustibles in microgravity[J]. SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES,2003,46(4):381-390. |
| APA | 杜文锋,&胡文瑞.(2003).Effect of ambient pressure and radiation reabsorption of atmosphere on the flame spreading over thermally thin combustibles in microgravity.SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES,46(4),381-390. |
| MLA | 杜文锋,et al."Effect of ambient pressure and radiation reabsorption of atmosphere on the flame spreading over thermally thin combustibles in microgravity".SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES 46.4(2003):381-390. |
入库方式： OAI收割
来源：力学研究所
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