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Blowout of non-premixed turbulent jet flames with coflow under microgravity condition

文献类型：期刊论文

作者Wang Q; Hu LH; Wang SM; Wang SF(王双峰); Chung SH; Fujita O
刊名COMBUSTION AND FLAME
出版日期2019-12-01
卷号210页码:315-323
关键词Non-premixed turbulent jet flame Coflow Blowout limit Microgravity Damkohler number
ISSN号0010-2180
DOI10.1016/j.combustflame.2019.08.041
英文摘要The blowout behavior of non-premixed turbulent coflow jet flames under microgravity environment was studied experimentally by utilizing a 3.6 s drop tower. Variations of flames leading to liftoff as well as blowout were examined by varying the coflow velocity and compared with those obtained under the normal gravity condition. A modeling work was conducted to incorporate the effects of the gravity (buoyancy) and coflow velocity on blowout behavior. Major findings include: (1) the flame length in microgravity was longer than that in normal gravity and decreased with increasing coflow velocity. The flame in microgravity showed more intense yellow luminosity with larger sooting zone; (2) the flame liftoff height increased with increasing coflow velocity in both gravity levels. The flame base was closer to the burner in microgravity as compared with that in normal gravity; (3) the blowout velocity in microgravity was appreciably larger than that obtained in normal gravity; and (4) a physical model based on Damkohler number was developed by using similarity solutions to characterize the differences in the blowout limits considering both the coflow and gravity (buoyancy) effects. The proposed model can successfully predict the experimental data. This work provided new data and basic scaling analysis for blowout limit of non-premixed turbulent jet flames considering both the coflow and gravity (buoyancy) effects. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
分类号一类/力学重要期刊
WOS关键词DIFFUSION FLAMES ; LIFTED FLAMES ; STABILIZATION MECHANISM ; GRAVITY ; VELOCITIES ; PRESSURES ; STABILITY ; AIR
WOS研究方向Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical
语种英语
WOS记录号WOS:000493856200024
资助机构National Natural Science Foundation of China (NSFC)National Natural Science Foundation of China [51976051, 51636008, 51606057, U1738117] ; Key Research Program of Frontier Sciences, Chinese Academy of Science (CAS) [QYZDB-SSW-JSC029] ; KIBAN(A) [181-103755] ; King Abdullah University of Science and Technology (KAUST)King Abdullah University of Science & Technology ; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities [JZ2018HGTB0256] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2018T110625, 2016M590580] ; Strategic Pioneer Program on Space Science, the Chinese Academy of Sciences [XDA15012800]
其他责任者Hu, LH (reprint author)
源URL[http://dspace.imech.ac.cn/handle/311007/80791]  
专题力学研究所_国家微重力实验室
作者单位1.Hokkaido Univ, Div Mech & Space Engn, Sapporo, Hokkaido 0608628, Japan
2.King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal, Saudi Arabia
3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
4.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
5.Hefei Univ Technol, Sch Transportat Engn, Hefei 230009, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Wang Q,Hu LH,Wang SM,et al. Blowout of non-premixed turbulent jet flames with coflow under microgravity condition[J]. COMBUSTION AND FLAME,2019,210:315-323.
APA Wang Q,Hu LH,Wang SM,王双峰,Chung SH,&Fujita O.(2019).Blowout of non-premixed turbulent jet flames with coflow under microgravity condition.COMBUSTION AND FLAME,210,315-323.
MLA Wang Q,et al."Blowout of non-premixed turbulent jet flames with coflow under microgravity condition".COMBUSTION AND FLAME 210(2019):315-323.

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来源：力学研究所

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