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); Sung, CJ (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
发表期刊	AIAA Journal
	1999
卷号	37 期号:2 页码:208-214
ISSN	0001-1452
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.
学科领域	力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000078557000009
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
引用统计	被引频次：19[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/311007/17271
专题	力学所知识产出(1956-2008)
通讯作者	Sung, CJ (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
推荐引用方式 GB/T 7714	Sung CJ,Li JG,Yu G,et al. 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,&Sung, CJ .(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.

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