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

doi:10.1016/j.combustflame.2019.08.041

IMECH-IR > 微重力重点实验室

	Blowout of non-premixed turbulent jet flames with coflow under microgravity condition
	Wang Q ; Hu LH ; Wang SM ; Wang SF(王双峰); Chung SH ; Fujita O
发表期刊	COMBUSTION AND FLAME
	2019-12-01
卷号	210 页码:315-323
ISSN	0010-2180
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.
关键词	Non-premixed turbulent jet flame Coflow Blowout limit Microgravity Damkohler number
DOI	10.1016/j.combustflame.2019.08.041
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000493856200024
关键词[WOS]	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
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering
项目资助者	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]
论文分区	一类/力学重要期刊
力学所作者排名	4
RpAuthor	Hu, LH (reprint author)
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/80791
专题	微重力重点实验室
作者单位	1.Hefei Univ Technol, Sch Transportat Engn, Hefei 230009, Anhui, Peoples R China 2.Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 4.King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal, Saudi Arabia 5.Hokkaido Univ, Div Mech & Space Engn, Sapporo, Hokkaido 0608628, Japan
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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