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Experimental realization and characterization of unstretched planar one-dimensional diffusion flames
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.
2013 (English)In: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 160, no 3, 546-556 p.Article in journal (Refereed) Published
Abstract [en]

A burner configuration that allows the creation of nearly unstretched one-dimensional diffusion flames has recently been introduced. This paper presents the first detailed characterization of flames produced in such a burner to assess how well they approach the idealized one-dimensional configuration, which is used extensively for the development of theoretical models for diffusion flame stability. Particular emphasis is directed at quantifying the remaining inhomogeneities in the burner, such as residual flame stretch or variations in the boundary conditions, and identifying possible means to minimize them. Measurements made include the velocity field, stable species concentration profiles and temperature distribution throughout the burning chamber. Additionally, the flame position in the burner is determined as a function of mixture strength, reactant transport properties and bulk flow velocity. All the measurements are found to be in good agreement with a simplified one-dimensional flame model. However, the boundary conditions and their physical location have to be determined experimentally on both sides of the flame, which complicates comparison with results from theoretical and numerical models. Despite these limitations, we conclude that this new burner type provides a good experimental approximation of the one-dimensional idealized construct.

Place, publisher, year, edition, pages
2013. Vol. 160, no 3, 546-556 p.
Keyword [en]
Diffusion flame, Unstretched, One-dimensional
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-119095DOI: 10.1016/j.combustflame.2012.11.011ISI: 000314666900006ScopusID: 2-s2.0-84872839463OAI: diva2:611006
Swedish Research Council, 2009-6159

QC 20130314

Available from: 2013-03-14 Created: 2013-03-07 Last updated: 2013-03-14Bibliographically approved

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Robert, Etienne
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