The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow
文献类型：期刊论文
| 作者 | Wu CJ(吴传嘉) ; Zhu F(朱凤); Wang SF(王双峰)
|
| 刊名 | FIRE SAFETY JOURNAL
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 129页码:8 |
| 关键词 | Stretch rate Flame spread Regression Flammability Cylinder |
| ISSN号 | 0379-7112 |
| DOI | 10.1016/j.firesaf.2022.103569 |
| 通讯作者 | Zhu, Feng(zhufeng@imech.ac.cn) |
| 英文摘要 | This work studies the flame spread over horizontal thick PMMA (polymethyl methacrylate) rods with three radii under different oxygen concentrations and upward cross flow velocities. The flame spread rate and the limit oxygen concentration are measured. Far away from the extinction limit, the flame spread rate increases with the flow velocity but decreases with radius. Near the extinction limit, the flame spread rate is insensitive to the flow velocity and radius. The flame spread rate can be correlated by the stretch rate, and it is found that the flame spread rates for different radii are close at the same stretch rate. A scaling analysis shows that the flame spread rates are approximately square-root dependent on the stretch rate. Prior to the extinction, the flame has entered the regressive burning regime where the flame leading edge will not spread forwardly but continuously retreat. The flame extinction is dependent on the local stretch rate and in-depth heat conduction. For a given radius, the limit oxygen concentration increases with the stretch rate. For a given stretch rate, the smaller cylinder can sustain at lower oxygen concentration due to the less solid-phase heat loss. |
| 分类号 | 二类 |
| WOS关键词 | OPPOSED FLOW ; EXTINCTION ; CONCURRENT |
| 资助项目 | National Key R&D Program of China[2021YFA0716203] ; Opening Fund of State Key Laboratory of Fire Science (SKLFS)[HZ2021-KF12] ; National Natural Science Foundation of China[U1738117] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000912262000001 |
| 资助机构 | National Key R&D Program of China ; Opening Fund of State Key Laboratory of Fire Science (SKLFS) ; National Natural Science Foundation of China |
| 其他责任者 | Zhu, Feng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91531]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 推荐引用方式 GB/T 7714 | Wu CJ,Zhu F,Wang SF. The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow[J]. FIRE SAFETY JOURNAL,2022,129:8. |
| APA | 吴传嘉,朱凤,&王双峰.(2022).The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow.FIRE SAFETY JOURNAL,129,8. |
| MLA | 吴传嘉,et al."The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow".FIRE SAFETY JOURNAL 129(2022):8. |
入库方式： OAI收割
来源：力学研究所
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