Effects of curvature on flame acceleration in micro channels

doi:10.1016/j.combustflame.2022.112168

GIEC OpenIR

	Effects of curvature on flame acceleration in micro channels
	Li, Tao1,2 ; Huo, Jiepeng 1,2; Li, Xing 1,2,3; Kong, Fanfu 4; Wang, Xiaohan1,2 ; Xu, Baopeng 4
	2022-08-01
发表期刊	COMBUSTION AND FLAME
ISSN	0010-2180
卷号	242 页码:9
通讯作者	Wang, Xiaohan(wangxh@ms.giec.ac.cn) ; Xu, Baopeng(baopengxu@dlut.edu.cn)
摘要	The effects of channel curvature on the flame propagation are examined for premixed flames in micro channels. Previous studies have shown that curved channels can enhance the flame stretching, which can significantly increase the flame propagation speed. In this study, the effect of flame stretching was excluded by the narrow channel limit in order to study the effects of channel curvature on the flame propagation. An asymptotic approach was first extended to include the effects of channel curvature. Accordingly, the two-dimensional problem was reduced to an effective one-dimensional problem with a clear physical meaning of curvature. A parametric study of curvature was then performed to investigate its effects on the flame propagation. It was found that curvature inhibits both the convection and diffusion processes. An increase in the curvature results in a significantly reduced flame thickness and a significantly increased reaction rate. Furthermore, the initial flame propagation speed is smaller in the channel with a larger curvature, but its growth rate is higher under the same ignition condition. With a large channel curvature, the flame has a smaller propagation speed of the steady compressibility-driven flame and a shorter distance to reach the steady state. (C) 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
关键词	Flame acceleration Curvature effect Narrow channels Asymptotic approach
DOI	10.1016/j.combustflame.2022.112168
关键词[WOS]	PROPAGATION ; DETONATION ; COMPRESSIBILITY
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2018YFB1501500] ; DNL Cooperation Fund, CAS[DNL202006]
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering
项目资助者	National Key R&D Program of China ; DNL Cooperation Fund, CAS
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical
WOS记录号	WOS:000831314000006
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36987
专题	中国科学院广州能源研究所
通讯作者	Wang, Xiaohan; Xu, Baopeng
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 4.Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Li, Tao,Huo, Jiepeng,Li, Xing,et al. Effects of curvature on flame acceleration in micro channels[J]. COMBUSTION AND FLAME,2022,242:9.
APA	Li, Tao,Huo, Jiepeng,Li, Xing,Kong, Fanfu,Wang, Xiaohan,&Xu, Baopeng.(2022).Effects of curvature on flame acceleration in micro channels.COMBUSTION AND FLAME,242,9.
MLA	Li, Tao,et al."Effects of curvature on flame acceleration in micro channels".COMBUSTION AND FLAME 242(2022):9.