Structure of n-heptane/air triple flames in partially-premixed mixing layers

Prager, J; Najm, HN; Valorani, M; Goussis, DA

dc.contributor.author	Prager, J	en
dc.contributor.author	Najm, HN	en
dc.contributor.author	Valorani, M	en
dc.contributor.author	Goussis, DA	en
dc.date.accessioned	2014-03-01T01:37:09Z
dc.date.available	2014-03-01T01:37:09Z
dc.date.issued	2011	en
dc.identifier.issn	0010-2180	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21462
dc.subject	Edge flames	en
dc.subject	N-heptane	en
dc.subject	Triple flames	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Computational singular perturbation	en
dc.subject.other	Detailed models	en
dc.subject.other	Different process	en
dc.subject.other	Diffusion Flame	en
dc.subject.other	Edge flames	en
dc.subject.other	Equivalence ratios	en
dc.subject.other	Fuel stream	en
dc.subject.other	Heat release	en
dc.subject.other	Mixing layers	en
dc.subject.other	n-Heptanes	en
dc.subject.other	Premixed	en
dc.subject.other	Reacting flows	en
dc.subject.other	Reaction mechanism	en
dc.subject.other	Reversible reaction	en
dc.subject.other	Skeletal mechanism	en
dc.subject.other	Species profile	en
dc.subject.other	Species transport	en
dc.subject.other	Triple flame	en
dc.subject.other	Two-dimensional domain	en
dc.subject.other	Velocity field	en
dc.subject.other	Explosives	en
dc.subject.other	Fuels	en
dc.subject.other	Heptane	en
dc.subject.other	Mach number	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Velocity	en
dc.subject.other	Chemical analysis	en
dc.subject.other	heptane	en
dc.subject.other	accuracy	en
dc.subject.other	air	en
dc.subject.other	article	en
dc.subject.other	chemical reaction	en
dc.subject.other	chemical structure	en
dc.subject.other	combustion	en
dc.subject.other	fire	en
dc.subject.other	heat	en
dc.subject.other	mathematical analysis	en
dc.subject.other	mathematical model	en
dc.subject.other	priority journal	en
dc.subject.other	reaction analysis	en
dc.subject.other	velocity	en
dc.title	Structure of n-heptane/air triple flames in partially-premixed mixing layers	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.combustflame.2011.03.017	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.combustflame.2011.03.017	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Results of a detailed numerical analysis of an n-heptane/air edge flame are presented. The equations of a low-Mach number reacting flow are solved in a two-dimensional domain using detailed models for species transport and chemical reactions. The reaction mechanism involves 560 species and 2538 reversible reactions. We consider an edge flame that is established in a mixing layer with a uniform velocity field. The mixing layer spans the equivalence ratios between pure air and 3.5. The detailed model enables us to analyze the chemical structure of the n-heptane edge flame. We identify major species profiles, discuss reactions causing the heat-release, and exploit Computational Singular Perturbation (CSP) to discuss the main fuel-consumption pathways and the structure of explosive modes in the edge flame. This analysis is performed for several regions in the edge flame to discuss the different processes at work in the premixed branches and the trailing diffusion flame. We compare different cuts through the 2D edge flame to canonical 1D premixed and diffusion flames. We also analyze the accuracy of a skeletal mechanism which was previously developed using CSP from homogeneous ignition calculations of n-heptane and show that a significant reduction in size of the mechanism can be achieved without a significant decrease in accuracy of the edge flame computation. This skeletal mechanism is then used to study the effects of increasing the equivalence ratio in the partially-premixed fuel stream. (C) 2011 The Combustion Institute. Published by Elsevier Inc. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE INC	en
heal.journalName	Combustion and Flame	en
dc.identifier.doi	10.1016/j.combustflame.2011.03.017	en
dc.identifier.isi	ISI:000295424600005	en
dc.identifier.volume	158	en
dc.identifier.issue	11	en
dc.identifier.spage	2128	en
dc.identifier.epage	2144	en