Opposed Flame Spread over Cylindrical PMMA Under Oxygen-Enriched Microgravity Environment
文献类型：期刊论文
| 作者 | Wu CJ(吴传嘉)3 ; Wang SF(王双峰)3,4; Zhu F(朱凤)3,4; Huang XY2; Yin YL1
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| 刊名 | FIRE TECHNOLOGY
 |
| 出版日期 | 2020 |
| 卷号 | 56期号:1页码:71-89 |
| 关键词 | Spacecraft fire safety Blue flame Cast and extruded PMMA Thermally-thick fuel Extinction |
| ISSN号 | 0015-2684 |
| DOI | 10.1007/s10694-019-00896-8 |
| 通讯作者 | Wang, Shuangfeng(sfwang@imech.ac.cn) |
| 英文摘要 | 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. |
| 分类号 | Q3 |
| WOS关键词 | DIFFUSION FLAME ; FUEL ; FLOW ; COMBUSTION ; BOUNDARY ; VELOCITY ; WIRE ; SOOT |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000512076800005 |
| 其他责任者 | Wang, Shuangfeng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/81520]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.China Astronaut Res & Training Ctr, Beijing, Peoples R China 2.Hong Kong Polytech Univ, Res Ctr Fire Engn, Kowloon, Hong Kong, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China; 4.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, 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. |
入库方式： OAI收割
来源：力学研究所
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