Cellular instabilities of n-butane/air flat flames probing by PLIF-OH and PLIF-CH2O laser diagnosis

doi:10.1016/j.expthermflusci.2020.110155

	Cellular instabilities of n-butane/air flat flames probing by PLIF-OH and PLIF-CH2O laser diagnosis
	Jiang, Liqiao 1,2; Gu, Cheng 1; Zhou, Guangzhao 1; Li, Fan 1; Wang, Qianlong 3
刊名	EXPERIMENTAL THERMAL AND FLUID SCIENCE
	2020-10-01
卷号	118 页码:7
关键词	Cellular instability PLIF-OH PLIF-CH2O N-butane
ISSN号	0894-1777
DOI	10.1016/j.expthermflusci.2020.110155
通讯作者	Jiang, Liqiao(jianglq@ms.giec.ac.cn)
英文摘要	The structure and instability characteristics of non-adiabatic fuel-rich n-butane/air cellular flames on McKenna burner were experimentally investigated at atmospheric pressure. Planar Laser Induced Fluorescence (PLIF-OH and PLIF-CH2O) flame diagnosis technology was utilized to probe the flame structure under varied equivalence ratio and inflow mixture velocity respectively. Results show that, the equivalence ratio plays an important role in forming cellular flames. The flat, wrinkled and cellular flames appear in turn when increasing equivalence ratio and inflow velocity. Differed to the separated cells of cellular flames appeared in direct Digital camera images and PLIF-OH images, the PLIF-CH2O images clearly display that all cellular flames are connected. In the PLIF-OH images of cellular flames, the OH radical fluorescence signal intensity is higher in the convex region toward unburned mixture than in the concave region, but in PLIF-CH2O images, the fluorescence signal intensity is nearly unchanged in both convex and concave regions. Quantitative stand-off distance and amplitude data probed by PLIF-OH and PLIF-CH2O diagnosis together reveal that the onset of non-adiabatic n-butane/air cellular flames on flat flame burner is dominantly governed by diffusive-thermal mechanism.
资助项目	National Basic Research Program of China[2014CB239600] ; National Key R&D Program of China[2016YFE0127500] ; Science and Technology Project of Guangdong Province of China[2016A040403095]
WOS关键词	PREMIXED FLAMES ; PROPAGATION SPEEDS ; DIFFUSION ; FORMALDEHYDE ; ONSET ; AIR
WOS研究方向	Thermodynamics ; Engineering ; Physics
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000540372900019
资助机构	National Basic Research Program of China ; National Key R&D Program of China ; Science and Technology Project of Guangdong Province of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/27308]
专题	中国科学院广州能源研究所
通讯作者	Jiang, Liqiao
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 3.Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Liqiao,Gu, Cheng,Zhou, Guangzhao,et al. Cellular instabilities of n-butane/air flat flames probing by PLIF-OH and PLIF-CH2O laser diagnosis[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2020,118:7.
APA	Jiang, Liqiao,Gu, Cheng,Zhou, Guangzhao,Li, Fan,&Wang, Qianlong.(2020).Cellular instabilities of n-butane/air flat flames probing by PLIF-OH and PLIF-CH2O laser diagnosis.EXPERIMENTAL THERMAL AND FLUID SCIENCE,118,7.
MLA	Jiang, Liqiao,et al."Cellular instabilities of n-butane/air flat flames probing by PLIF-OH and PLIF-CH2O laser diagnosis".EXPERIMENTAL THERMAL AND FLUID SCIENCE 118(2020):7.