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Material Properties Governing Co-Current Flame Spread: The Effect of Air EntrainmentA study on the effects of lateral air entrainment on an upward spreading flame has been conducted. The fuel is a flat PMMA plate of constant length and thickness but variable width. Video images and surface temperatures have allowed establishing the progression of the pyrolyis front and on the flame stand-off distance. These measurements have been incorporated into a theoretical formulation to establish characteristic mass transfer numbers ("B" numbers). The mass transfer number is deemed as a material related parameter that could be used to assess the potential of a material to sustain co-current flame spread. The experimental results show that the theoretical formulation fails to describe heat exchange between the flame and the surface. The discrepancies seem to be associated to lateral air entrainment that lifts the flame off the surface and leads to an over estimation of the local mass transfer number. Particle Image Velocimetry (PIV) measurements are in the process of being acquired. These measurements are intended to provide insight on the effect of air entrainment on the flame stand-off distance. A brief description of the methodology to be followed is presented here.
Document ID
20040053519
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Coutin, Mickael (Maryland Univ. College Park, MD, United States)
Rangwala, Ali S. (Maryland Univ. College Park, MD, United States)
Torero, Jose L. (Maryland Univ. College Park, MD, United States)
Buckley, Steven G. (Maryland Univ. College Park, MD, United States)
Date Acquired
September 7, 2013
Publication Date
August 1, 2003
Publication Information
Publication: Seventh International Workshop on Microgravity Combustion and Chemically Reacting Systems
Subject Category
Chemistry And Materials (General)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20040053504Collected WorksSeventh International Workshop on Microgravity Combustion and Chemically Reacting Systems
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