Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures

doi:10.1016/j.energy.2020.118981

	Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures
	Li, Xing 1,2,3; Xie, Shengrong 1,2,3; Zhang, Jing 1,2,3; Li, Tao 1,2,3; Wang, Xiaohan 1,2,3
刊名	ENERGY
	2021
卷号	214 页码:10
关键词	Biogas Non-premixed jet flame Elevated air temperature Laminar flame height Liftoff Blowout
ISSN号	0360-5442
DOI	10.1016/j.energy.2020.118981
通讯作者	Li, Xing(lixing@ms.giec.ac.cn) ; Zhang, Jing(zhangjing@ms.giec.ac.cn)
英文摘要	Experimental study on the combustion characteristics of CH4/CO2 non-premixed jet flames in a coflow air at normal and elevated temperatures was conducted for the development of biogas-fueled regenerative burner. The CH4/N-2 non-premixed jet flame was also investigated for comparison. The laminar flame height, lift-off height and blow-out limit were obtained and compared. The experimental results show that the laminar flame height of CH4/CO2 flame is lower than that of CH4/N-2 flame in the same condition. The reason was clarified by theoretical analysis and two-dimensional numerical computation. For the turbulent flame, the CO2 dilution in the fuel steam leads to a higher liftoff height and a lower blowout limit. The fuel velocity range of stable lifted flame and the blowout limit are significantly increased at elevated air temperature. The premixed flame model was employed to analyze the liftoff heights and blowout velocities. The non-dimensional liftoff height increases linearly versus the non-dimensional fuel jet velocity. And linear relationship between non-dimensional blowout velocity and Reynolds number was obtained. The influences of laminar flame speed, fuel kinematic viscosity and the density ratio of fuel to coflow air on liftoff height and blowout limit were investigated by using the premixed flame model and sensitivity analysis. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[51506204] ; National Key R&D Program of China[2018YFB1501500]
WOS研究方向	Thermodynamics ; Energy & Fuels
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000596810200011
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/32412]
专题	中国科学院广州能源研究所
通讯作者	Li, Xing; Zhang, Jing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China 2.CAS Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Li, Xing,Xie, Shengrong,Zhang, Jing,et al. Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures[J]. ENERGY,2021,214:10.
APA	Li, Xing,Xie, Shengrong,Zhang, Jing,Li, Tao,&Wang, Xiaohan.(2021).Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures.ENERGY,214,10.
MLA	Li, Xing,et al."Combustion characteristics of non-premixed CH4/CO2 jet flames in coflow air at normal and elevated temperatures".ENERGY 214(2021):10.