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NOx emission and its reduction mechanism investigation in one diffusion-like vortex-tube combustor
Ren, Shoujun1,2,3,4; Wang, Xiaohan1,3,4
2020-11-20
发表期刊JOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
卷号274页码:11
通讯作者Ren, Shoujun(rensj@ms.giec.ac.cn) ; Wang, Xiaohan(wangxh@ms.giec.ac.cn)
摘要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.
关键词Vortex-tube combustor Ultra-lean combustion Axial fuel-injected NOx emission Stability limit Turbulent diffusion velocity
DOI10.1016/j.jclepro.2020.123138
收录类别SCI
语种英语
资助项目National Key Research and Development Plan 'Intergovernmental International Scientific and Technological Innovation Cooperation' Key Specific Project[2016YFE0127500]
WOS研究方向Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
项目资助者National Key Research and Development Plan 'Intergovernmental International Scientific and Technological Innovation Cooperation' Key Specific Project
WOS类目Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS记录号WOS:000579490900014
出版者ELSEVIER SCI LTD
引用统计
被引频次:6[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/344007/32193
专题中国科学院广州能源研究所
通讯作者Ren, Shoujun; Wang, Xiaohan
作者单位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
第一作者单位中国科学院广州能源研究所
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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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