Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| C-shaped extinction curves and lean fuel limits of methane oxy-fuel diffusion flames at different oxygen concentrations | |
Li, Xing1,2,3; Zhang, Jing1,2,3; Huo, Jiepeng1,2,3; Wang, Xiaohan1,2,3 ; Jiang, Liqiao1,2,3; Zhao, Daiqing1,2,3
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| 2020 | |
| Source Publication | FUEL
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| ISSN | 0016-2361 |
| Volume | 259Pages:9 |
| Corresponding Author | Li, Xing(lixing@ms.giec.ac.cn) ; Wang, Xiaohan(wangxh@ms.giec.ac.cn) |
| Abstract | 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. |
| Keyword | Methane oxy-fuel diffusion flame Oxygen concentration Stretch extinction Radiative extinction Lean fuel limit Radiation reabsorption |
| DOI | 10.1016/j.fuel.2019.116296 |
| WOS Keyword | IGNITION DELAY TIMES ; NON-PREMIXED FLAMES ; SHOCK-TUBE ; COMBUSTION ; AIR ; TEMPERATURE ; STABILIZATION ; CH4/CO2 ; CO2 ; PRESSURES |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Energy & Fuels ; Engineering |
| Funding Organization | National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| WOS ID | WOS:000489332600013 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/25955 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Li, Xing; Wang, Xiaohan |
| Affiliation | 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 |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation 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. |
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