Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| NOx emission and its reduction mechanism investigation in one diffusion-like vortex-tube combustor | |
Ren, Shoujun1,2,3,4; Wang, Xiaohan1,3,4
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| 2020-11-20 | |
| Source Publication | JOURNAL OF CLEANER PRODUCTION
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| ISSN | 0959-6526 |
| Volume | 274Pages:11 |
| Corresponding Author | Ren, Shoujun(rensj@ms.giec.ac.cn) ; Wang, Xiaohan(wangxh@ms.giec.ac.cn) |
| Abstract | In order to overcome the instability of ultra-lean combustion, a novel vortex-tube combustor with axial fuel injection was proposed. The stability limit, flame configuration, NOx emissions, and burn-off rate of the combustor were investigated experimentally under various global equivalence ratios (phi(g)) and fuel flow rates (q(f)). Results show that the combustor exhibits a large stability limit with phi(g) and q(f) as low as 0.01 and 6 x 10(-5) m(3)/s respectively. Complete combustion and ultra-low NOx emissions of less than 3 ppm can be achieved at phi(g) of 0.3 and q(f) of more than 30 x 10(-5) m(3)/s, indicating that the combustor has a good potential for ultra-lean combustion and low NOx emission. The pressure fluctuation amplitude is always less than 1300 Pa during the entire experiments. The vortex-induced flame has a diffusion-like flame structure, which provides a suitable equivalence ratio zone under ultra-lean conditions, whilst the high peak combustion temperature indicates an intensified combustion, which is responsible for the large stability limit and low-pressure fluctuation amplitude. Subsequently, the enhanced stabilization can enable the ultra-lean combustion and the ensued low temperature to conduct, whilst the vortex-flow can decrease the local flow velocity and enable the turbulent diffusion velocity of NO to be dominant, which can make the NO emission reduced further. The decreased area of high-temperature region and the appearance of the negative reaction rate region of NO is the essential reason for the decrease of the NO emission at lean cases. (C) 2020 Elsevier Ltd. All rights reserved. |
| Keyword | Vortex-tube combustor Ultra-lean combustion Axial fuel-injected NOx emission Stability limit Turbulent diffusion velocity |
| DOI | 10.1016/j.jclepro.2020.123138 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Plan 'Intergovernmental International Scientific and Technological Innovation Cooperation' Key Specific Project[2016YFE0127500] |
| WOS Research Area | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| Funding Organization | National Key Research and Development Plan 'Intergovernmental International Scientific and Technological Innovation Cooperation' Key Specific Project |
| WOS Subject | Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences |
| WOS ID | WOS:000579490900014 |
| Publisher | ELSEVIER SCI LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/32193 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Ren, Shoujun; Wang, Xiaohan |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, Nanjing, Peoples R China 3.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China 4.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Ren, Shoujun,Wang, Xiaohan. NOx emission and its reduction mechanism investigation in one diffusion-like vortex-tube combustor[J]. JOURNAL OF CLEANER PRODUCTION,2020,274:11. |
| APA | Ren, Shoujun,&Wang, Xiaohan.(2020).NOx emission and its reduction mechanism investigation in one diffusion-like vortex-tube combustor.JOURNAL OF CLEANER PRODUCTION,274,11. |
| MLA | Ren, Shoujun,et al."NOx emission and its reduction mechanism investigation in one diffusion-like vortex-tube combustor".JOURNAL OF CLEANER PRODUCTION 274(2020):11. |
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