C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations

doi:10.1016/j.fuel.2019.116296

	C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations
	Li, Xing 1,2,3; Zhang, Jing 1,2,3; Huo, Jiepeng 1,2,3; Wang, Xiaohan 1,2,3; Jiang, Liqiao 1,2,3; Zhao, Daiqing 1,2,3
刊名	FUEL
	2020
卷号	259 页码:9
关键词	Methane oxy-fuel diffusion flame Oxygen concentration Stretch extinction Radiative extinction Lean fuel limit Radiation reabsorption
ISSN号	0016-2361
DOI	10.1016/j.fuel.2019.116296
通讯作者	Li, Xing(lixing@ms.giec.ac.cn) ; Wang, Xiaohan(wangxh@ms.giec.ac.cn)
英文摘要	The extinction characteristics and lean fuel limits of methane oxy-fuel diffusion flames with oxygen mole fractions of 0.35 and 0.4 were numerically studied by using two different radiation models, namely optically thin radiation model (OTM) and discrete ordinates method (DOM). Experimental studies on extinction limits of the oxy-fuel diffusion flames under normal- and micro- gravity conditions were conducted. The results of methane air diffusion flame from present normal-gravity and previous micro-gravity experiments were used for comparison and analysis. C-shaped extinction curves, which consist of the stretch and the radiation extinction branches, were obtained by numerical computations using OTM and DOM for the oxy-fuel diffusion flame. The computational results by using the two different radiation models were compared with the experimental results. The computational lean fuel limit by using the DOM agrees well with the experimental result, while the result by OTM is slightly higher. The primary reason is due the effect of radiation reabsorption, which is not considered in the OTM. The computational and experimental results show that the effects of oxygen concentration of the oxidizer on the combustion region and lean fuel limit of the oxy-fuel diffusion flame are significant. The lean fuel limit of oxy-fuel diffusion flame increases with increasing oxygen concentration. Both computational and experimental results suggest that the lean fuel limit of the methane oxy-fuel diffusion flame with oxygen mole fraction of 0.4 is higher than that of the methane air diffusion flame.
资助项目	National Key R&D Program of China[2018YFB1501500] ; National Natural Science Foundation of China[51506204] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA 21060102]
WOS关键词	IGNITION DELAY TIMES ; NON-PREMIXED FLAMES ; SHOCK-TUBE ; COMBUSTION ; AIR ; TEMPERATURE ; STABILIZATION ; CH4/CO2 ; CO2 ; PRESSURES
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000489332600013
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/25954]
专题	中国科学院广州能源研究所
通讯作者	Li, Xing; Wang, Xiaohan
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Guangdong, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Li, Xing,Zhang, Jing,Huo, Jiepeng,et al. C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations[J]. FUEL,2020,259:9.
APA	Li, Xing,Zhang, Jing,Huo, Jiepeng,Wang, Xiaohan,Jiang, Liqiao,&Zhao, Daiqing.(2020).C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations.FUEL,259,9.
MLA	Li, Xing,et al."C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations".FUEL 259(2020):9.