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

doi:10.1016/j.combustflame.2019.04.003

GIEC OpenIR

	Temperature gradient induced detonation development inside and outside a hotspot for different fuels
	Pan, Jiaying 1; Dong, Sheng 1; Wei, Haiqiao 1; Li, Tao2 ; Shu, Gequn 1; Zhou, Lei 1
	2019-07-01
发表期刊	COMBUSTION AND FLAME
ISSN	0010-2180
卷号	205 页码:269-277
通讯作者	Wei, Haiqiao(whq@tju.edu.cn) ; Zhou, Lei(lei.zhou@tju.edu.cn)
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.
关键词	Detonation development Detonation peninsula Critical temperature gradient Combustion mode transition Mixture reactivity
DOI	10.1016/j.combustflame.2019.04.003
关键词[WOS]	REACTION FRONT PROPAGATION ; AUTO-IGNITION ; KNOCKING COMBUSTION ; FLAME PROPAGATION ; PRESSURE WAVE ; PRE-IGNITION ; HOT-SPOT ; MECHANISM ; AUTOIGNITION ; OXIDATION
收录类别	SCI
语种	英语
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研究方向	Thermodynamics ; Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; Tianjin Natural Science Foundation
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical
WOS记录号	WOS:000471742000025
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：56[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/344007/25169
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.