The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow

doi:10.1016/j.firesaf.2022.103569

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	The controlling mechanisms of horizontal flame spread over thick rods in upward cross flow
	Wu CJ(吴传嘉); Zhu F(朱凤); Wang SF(王双峰)
通讯作者	Zhu, Feng(zhufeng@imech.ac.cn)
发表期刊	FIRE SAFETY JOURNAL
	2022-05-01
卷号	129 页码:8
ISSN	0379-7112
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.
关键词	Stretch rate Flame spread Regression Flammability Cylinder
DOI	10.1016/j.firesaf.2022.103569
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000912262000001
关键词[WOS]	OPPOSED FLOW ; EXTINCTION ; CONCURRENT
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Civil ; Materials Science, Multidisciplinary
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]
项目资助者	National Key R&D Program of China ; Opening Fund of State Key Laboratory of Fire Science (SKLFS) ; National Natural Science Foundation of China
论文分区	二类
力学所作者排名	1
RpAuthor	Zhu, Feng
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91532
专题	微重力重点实验室
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.

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