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2007.87: Flame propagation in a nonuniform mixture: analysis of a slowly varying triple flame

2007.87: J W Dold (1989) Flame propagation in a nonuniform mixture: analysis of a slowly varying triple flame. Combustion and Flame, 76. pp. 71-88.

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Abstract

For flames propagating through a nonuniform medium a three-flame structure is described. This consists of a feul-rich premixed flame, a feul-lean premixed flame, and, starting where these flames meet, a diffusion flame. Such formations have been observed experimentally and probably occur as laminar flamelets in turbulent diffusion flames. A low-heat-release model for such flame structures is developed and solutions are obtained in the limit of slowly varying premixed flames. Under these conditions, it is shown that the Triple-Flame propagation speed depends on the transverse mixture fraction gradient and is bounded from above by the maximum adiabatic laminar flame speed of the system.

Item Type:Article
Subjects:MSC 2000 > 35 Partial differential equations
MSC 2000 > 41 Approximations and expansions
PACS 2003 > 82 Physical chemistry and chemical physics molecular physics
MIMS number:2007.87
Deposited By:Prof John Dold
Deposited On:23 May 2007

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