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

doi:10.1016/j.energy.2020.118981

GIEC OpenIR

	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, Tao1,2,3 ; Wang, Xiaohan1,2,3
	2021
发表期刊	ENERGY
ISSN	0360-5442
卷号	214 页码:10
通讯作者	Li, Xing(lixing@ms.giec.ac.cn) ; Zhang, Jing(zhangjing@ms.giec.ac.cn)
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.
关键词	Biogas Non-premixed jet flame Elevated air temperature Laminar flame height Liftoff Blowout
DOI	10.1016/j.energy.2020.118981
收录类别	SCI
语种	英语
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
项目资助者	National Natural Science Foundation of China ; National Key R&D Program of China
WOS类目	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:000596810200011
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：18[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/344007/32413
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.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China 3.CAS Key Lab Renewable Energy, Guangzhou 510640, 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, 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.