Temperature gradient induced detonation development inside and outside a hotspot for different fuels

doi:10.1016/j.combustflame.2019.04.003

	Temperature gradient induced detonation development inside and outside a hotspot for different fuels
	Pan, Jiaying 1; Dong, Sheng 1; Wei, Haiqiao 1; Li, Tao 2; Shu, Gequn 1; Zhou, Lei 1
刊名	COMBUSTION AND FLAME
	2019-07-01
卷号	205 页码:269-277
关键词	Detonation development Detonation peninsula Critical temperature gradient Combustion mode transition Mixture reactivity
ISSN号	0010-2180
DOI	10.1016/j.combustflame.2019.04.003
通讯作者	Wei, Haiqiao(whq@tju.edu.cn) ; Zhou, Lei(lei.zhou@tju.edu.cn)
英文摘要	With the dimensionless parameters obtained for syngas/air mixture, Bradley detonation peninsula is often used to determine the detonation development for hotspot autoignition (AI) in reactive flows. In this work, similar numerical simulations were carried out in order to identify the characteristics of detonation peninsula when considering other fuels. Three alternative Co0-1 fuels with detailed chemistry and transport were employed in a 1-D reaction wave propagation induced by temperature gradients, and different critical temperature gradients and hotspot sizes were considered. Meanwhile, the role of detonation parameters in the detonation development outside hotspot was addressed. First, the results show that different AI propagation modes can be well depicted using the dimensionless parameters for individual fuel at various critical temperature gradients. However, the quantitative difference in detonation development regime is significantly observed between different fuels with distinct physical-chemical properties even though similar regime distribution is observed. Second, the evolutions of AI reaction wave propagation outside hotspot were further studied, and combustion mode transitions involving detonation termination and formation were observed. The evolutions of the thermodynamic state of different flow particles show that detonation development is found to switch from constant-pressure to constant-volume combustion. Meanwhile, scaling analysis on combustion mode transitions indicates that besides the early-stage propagation controlled by reactivity gradient in hotspot interior, the reactivity of the mixture outside hotspot also plays an important role in detonation development. This can provide great insights into proposing integrated dimensionless parameters for determining detonation development in the whole reactive flows. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
资助项目	National Natural Science Foundation of China[51706152] ; National Natural Science Foundation of China[91641203] ; National Key R&D Program of China[2017YFE0102800] ; Tianjin Natural Science Foundation[18JCQNJC07500] ; Tianjin Natural Science Foundation[17JCZDJC31500]
WOS关键词	REACTION FRONT PROPAGATION ; AUTO-IGNITION ; KNOCKING COMBUSTION ; FLAME PROPAGATION ; PRESSURE WAVE ; PRE-IGNITION ; HOT-SPOT ; MECHANISM ; AUTOIGNITION ; OXIDATION
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000471742000025
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Tianjin Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/25168]
专题	中国科学院广州能源研究所
通讯作者	Wei, Haiqiao; Zhou, Lei
作者单位	1.Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Pan, Jiaying,Dong, Sheng,Wei, Haiqiao,et al. Temperature gradient induced detonation development inside and outside a hotspot for different fuels[J]. COMBUSTION AND FLAME,2019,205:269-277.
APA	Pan, Jiaying,Dong, Sheng,Wei, Haiqiao,Li, Tao,Shu, Gequn,&Zhou, Lei.(2019).Temperature gradient induced detonation development inside and outside a hotspot for different fuels.COMBUSTION AND FLAME,205,269-277.
MLA	Pan, Jiaying,et al."Temperature gradient induced detonation development inside and outside a hotspot for different fuels".COMBUSTION AND FLAME 205(2019):269-277.