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Flame Extinction of Spherical PMMA in Microgravity: Effect of Fuel Diameter and Conduction

文献类型：期刊论文

作者Wu CJ(吴传嘉)2,3; Sun PY1; Wang XZ(王秀珍)2,3; Huang XY1; Wang SF(王双峰)2,3
刊名MICROGRAVITY SCIENCE AND TECHNOLOGY
出版日期2020-09-28
页码11
关键词Spacecraft fire Plastic fuel Drop tower Curvature effect Heat conduction
ISSN号0938-0108
DOI10.1007/s12217-020-09829-5
通讯作者Huang, Xinyan(xy.huang@polyu.edu.hk) ; Wang, Shuangfeng(sfwang@imech.ac.cn)
英文摘要A series of experiments were conducted in the 3.6-s microgravity drop tower and normal gravity to investigate the effect of solid fuel curvature, conduction, and reradiation on the flame extinction of spherical polymethyl methacrylate (PMMA). In the semi-quiescent microgravity environment, flame extinction was observed if the PMMA diameter was larger than 40 mm, because of a smaller flame conductive heating in larger diameter (i.e., the curvature effect). Compared to the droplet combustion with a low evaporation point and fast heat convection in the liquid phase, the solid fuel has a high pyrolysis point and large transient heat conduction. Thus, the large surface reradiation effectively cools down the fuel surface to promote extinction. Also, as the initial burning duration increases, the conductive cooling into the solid fuel decreases, which delays or prevents the flame extinction in microgravity. The extinction criterion for microgravity flame is explained by the critical mass flux and mass-transfer number. This work helps to understand the curvature effect of solid fuel on flame extinction and the material fire safety in the microgravity spacecraft environment.
分类号二类
WOS关键词SPREAD ; COMBUSTION ; PROPAGATION ; TRANSITION ; RADIATION ; QUIESCENT ; GRAVITY ; LIMIT
资助项目National Natural Science Foundation of China[U1738117] ; National Natural Science Foundation of China[51876183] ; Strategic Priority Research Program on Space Science, the Chinese Academy of Sciences[XDA04020410] ; Strategic Priority Research Program on Space Science, the Chinese Academy of Sciences[XDA04020202-10]
WOS研究方向Engineering ; Thermodynamics ; Mechanics
语种英语
WOS记录号WOS:000573478300001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, the Chinese Academy of Sciences
其他责任者Huang, Xinyan ; Wang, Shuangfeng
源URL[http://dspace.imech.ac.cn/handle/311007/85285]  
专题力学研究所_国家微重力实验室
作者单位1.Hong Kong Polytech Univ, Dept Bldg Serv Engn, Res Ctr Fire Engn, Hong Kong, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing, Peoples R China;
推荐引用方式
GB/T 7714		 Wu CJ,Sun PY,Wang XZ,et al. Flame Extinction of Spherical PMMA in Microgravity: Effect of Fuel Diameter and Conduction[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2020:11.
APA 吴传嘉,Sun PY,王秀珍,Huang XY,&王双峰.(2020).Flame Extinction of Spherical PMMA in Microgravity: Effect of Fuel Diameter and Conduction.MICROGRAVITY SCIENCE AND TECHNOLOGY,11.
MLA 吴传嘉,et al."Flame Extinction of Spherical PMMA in Microgravity: Effect of Fuel Diameter and Conduction".MICROGRAVITY SCIENCE AND TECHNOLOGY (2020):11.

入库方式： OAI收割

来源：力学研究所

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