Chemical kinetics and self-ignition in a model supersonic hydrogen-air combustor

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	Chemical kinetics and self-ignition in a model supersonic hydrogen-air combustor
	Sung CJ; Li JG(李建国); Yu G(俞刚)
刊名	AIAA Journal
	1999
卷号	37 期号:2 页码:208-214
ISSN号	0001-1452
通讯作者	Sung, CJ (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
合作状况	国内
中文摘要	Self-ignition tests of a model scramjet combustor were conducted by using parallel sonic injection of gaseous hydrogen from the base of a blade-like strut into a supersonic vitiated airstream. The range of stagnation pressure and temperature studied varied from 1.0 to 4.5 MPa and from 1300 to 2200 K, respectively. Experimental results show that the self-ignition limit, in terms of either global or local quantities of pressure and temperature, exhibits a nonmonotonic behavior resembling the classical homogeneous explosion limit of the hydrogen-oxygen system. Specifically, for a given temperature, increasing pressure from a low value can render a nonignitable mixture to first become ignitable, then nonignitable again, This correspondence shows that, despite the globally supersonic nonpremixed configuration studied herein, ignition is strongly influenced by the intricate chemical reaction mechanism and thereby exhibits the homogeneous explosion character. Consequently, self-ignition criteria based on a global reaction rate approximating the complex chemistry are inadequate. An auxiliary computational study on counterflow ignition was also conducted to systematically investigate the contamination effects of vitiated air. Results indicate that the net contamination effects for the present experimental data are expected to be substantially smaller than contributions from the individual contamination species because of the counterbalancing influences of the H2O-inhibition and NO-promotion reactions in effecting ignition.
学科主题	力学
类目[WOS]	Engineering, Aerospace
研究领域[WOS]	Engineering
收录类别	SCI ; EI
原文出处	http://arc.aiaa.org/doi/abs/10.2514/2.715?journalCode=aiaaj
语种	英语
WOS记录号	WOS:000078557000009
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/17271]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Sung CJ,Li JG,Yu G. Chemical kinetics and self-ignition in a model supersonic hydrogen-air combustor[J]. AIAA Journal,1999,37(2):208-214.
APA	Sung CJ,Li JG,&Yu G.(1999).Chemical kinetics and self-ignition in a model supersonic hydrogen-air combustor.AIAA Journal,37(2),208-214.
MLA	Sung CJ,et al."Chemical kinetics and self-ignition in a model supersonic hydrogen-air combustor".AIAA Journal 37.2(1999):208-214.