Horizontal flame spread over thin solids in reduced buoyancy environments
文献类型：期刊论文
| 作者 | Wu, Chuanjia3,4 ; Xiao, Yuan; Wang, Shuangfeng1,2,3,4; Zhu, Feng4; Wang SF(王双峰); Wu CJ(吴传嘉); Wu CJ(吴传嘉); Wang SF(王双峰); Zhu F(朱凤)
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| 刊名 | COMBUSTION AND FLAME
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 240页码:12 |
| 关键词 | Flame spread Buoyancy Partial gravity Horizontal channel Thermoconvective instabilities |
| ISSN号 | 0010-2180 |
| DOI | 10.1016/j.combustflame.2022.112008 |
| 通讯作者 | Wang, Shuangfeng(sfwang@imech.ac.cn) |
| 英文摘要 | A Horizontal Channel Apparatus (HCA) has been employed to investigate opposed flame spread over solid fuels in reduced buoyancy environments, which would be encountered at the diminished gravitational levels on extraterrestrial surfaces (e.g., the partial gravity on the Moon and Mars) as well. With a scaling analysis, the characteristic buoyant flow velocity in HCA is well correlated to the channel height and the Rayleigh ( Ra ) number. The experimental results show that, without forced flow, the flame spread rate and flammability in HCA can be correlated with those at different gravity levels by using Ra number, in-dicating HCA may have the ability to simulate the burning characters in partial gravity. Together with the Reynolds ( Re ) and Ra numbers, which signify the role of forced and buoyant flow, respectively, the flame spread rates and the map of flammability of the solid fuel obtained in the current HCA experiments are determined. Furthermore, four distinctively different flame spread patterns are found at various channel heights and opposed-flow velocities once the width of the cellulosic sample is extended. Likewise, the map of flame spread patterns is governed by the Re and Ra. It is further found through the examinations of the time average of the mass-loss rate that as long as Ra is below a critical value, the opposed flow in terms of Re mainly determines the oxygen transportation, while the reduced buoyancy in terms of Ra mainly contributes to the bifurcations of the potential hydro/thermal instabilities.(c) 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved. |
| WOS关键词 | OPPOSED-FLOW ; MIXED CONVECTION ; FINGERING INSTABILITY ; FUELS ; PREDICTION ; CONCURRENT ; MECHANISMS ; NUMBER ; AIR |
| 资助项目 | National Key R&D Program of China[2021YFA0716203] ; National Natural Science Foundation of China[U1738117] ; early career development program of China East Jiaotong University[10 0320 03419068] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000777798300005 |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; early career development program of China East Jiaotong University |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/88883]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 通讯作者 | Wang, Shuangfeng |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.East China Jiaotong Univ, Sch Mech Vehicle Engn, Nanchang 330013, Jiangxi, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Chuanjia,Xiao, Yuan,Wang, Shuangfeng,et al. Horizontal flame spread over thin solids in reduced buoyancy environments[J]. COMBUSTION AND FLAME,2022,240:12. |
| APA | Wu, Chuanjia.,Xiao, Yuan.,Wang, Shuangfeng.,Zhu, Feng.,王双峰.,...&朱凤.(2022).Horizontal flame spread over thin solids in reduced buoyancy environments.COMBUSTION AND FLAME,240,12. |
| MLA | Wu, Chuanjia,et al."Horizontal flame spread over thin solids in reduced buoyancy environments".COMBUSTION AND FLAME 240(2022):12. |
入库方式： OAI收割
来源：力学研究所
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