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

doi:10.1007/s12217-020-09829-5

	Flame Extinction of Spherical PMMA in Microgravity: Effect of Fuel Diameter and Conduction
	Wu CJ(吴传嘉)1,3; Sun PY 2; Wang XZ(王秀珍)1,3; Huang XY 2; Wang SF(王双峰)1,3
刊名	MICROGRAVITY SCIENCE AND TECHNOLOGY
	2020-09-28
页码	11
关键词	Spacecraft fire Plastic fuel Drop tower Curvature effect Heat conduction
ISSN号	0938-0108
DOI	10.1007/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
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关键词	SPREAD ; COMBUSTION ; PROPAGATION ; TRANSITION ; RADIATION ; QUIESCENT ; GRAVITY ; LIMIT
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
内容类型	期刊论文
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.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing, Peoples R China; 2.Hong Kong Polytech Univ, Dept Bldg Serv Engn, Res Ctr Fire Engn, Hong Kong, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, 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.