Detonation limits in binary fuel blends of methane/hydrogen mixtures

doi:10.1016/j.fuel.2015.11.073

CORC > 北京大学 > 工学院

	Detonation limits in binary fuel blends of methane/hydrogen mixtures
	Zhang, Bo ; Pang, Lei ; Gao, Yuan
刊名	FUEL
	2016
关键词	Methane Hydrogen Detonation limit Velocity deficit Cellular structure METHANE-AIR MIXTURES GASEOUS DETONATIONS ANNULAR CHANNELS OXYGEN MIXTURES CRITICAL ENERGY HYDROGEN VELOCITY TUBE COMBUSTION INITIATION
DOI	10.1016/j.fuel.2015.11.073
英文摘要	Binary fuel blends of methane and hydrogen have a wide application in the internal combustion engines due to their promising combustion performance, although substantial studies have been carried to investigate the combustion characteristics, very limited study focused on its detonation limits for propagation in tubes or pipes. In this study, near detonation limits behavior, which includes velocity deficit and cellular structure, of binary fuel blends of methane and hydrogen mixtures with different compositions (i.e., CH4-2H(2)-3O(2), CH4-H-2-2.5O(2) and CH4-4H(2)-4O(2)) are experimentally studied, experiments are carried out in a 36 mm inner diameter round tube and annular channels with three gaps (w = 2 mm, 4.5 mm and 7 mm). The results show the maximum detonation velocity deficit is 7% of CJ (Chapman-Jouguet) velocity for three mixtures in the 36 mm inner diameter round tube, and this velocity deficit is universal in the mixtures with different compositions. As detonations transmit into the annular channels, the velocity deficits in CH4-2H(2)-3O(2) and CH4-4H(2)-4O(2) mixtures are very close, i.e., within 10-20% V-CJ in the different scale of channels. For CH4-H-2-2.5O(2) mixtures, velocity deficit varies from 15.0% to 34.1% V-CJ as the annular channel gap reduces from 7 mm to 2 mm, which is due to it has a higher degree of instability and hence more robust than other mixtures, a critical value of stability parameter chi is determined as 15-20, below which the instability has no significant effect on the velocity deficit. The cellular pattern from the smoked foils indicates single-headed spinning detonation in CH4-H-2-2.5O(2) mixture appears at lower initial pressure than other two mixtures, and the detonation cell size for this mixture is larger at the same initial condition, which is verified by the evidence from ZND induction zone length analysis. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [11402092, 51404029]; Fundamental Research Funds for the Central Universities [222201314030]; State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology [KFJJ15-03M]; SCI(E); EI; ARTICLE; bzhang@ecust.edu.cn; panglei0525@163.com; 27-33; 168
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437542]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, Bo,Pang, Lei,Gao, Yuan. Detonation limits in binary fuel blends of methane/hydrogen mixtures[J]. FUEL,2016.
APA	Zhang, Bo,Pang, Lei,&Gao, Yuan.(2016).Detonation limits in binary fuel blends of methane/hydrogen mixtures.FUEL.
MLA	Zhang, Bo,et al."Detonation limits in binary fuel blends of methane/hydrogen mixtures".FUEL (2016).