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Effect of the Reversibility of the Chemical Reaction on Triple Flames by Samina Ali; Joel Daou is a Engineering article available to read on EtoBox.

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We examine a new aspect of triple flames, namely the effect of the reversibility of the chemical reaction on flame propagation. The study is carried out in the configuration of the two-dimensional strained mixing layer formed between two opposing streams of fuel and oxidiser. The chemical reaction is modelled as a single reversible reaction following an Arrhenius law in the forward and backward directions. The problem is formulated within the constant-density (thermo-diffusive) approximation, the main non-dimensional parameters relevant to this study being a reversibility parameter R (equal to zero in the irreversible case), a non-dimensional measure of the strain rate and a stoichiometric parameter S. We provide analytical (asymptotic) expressions for the local burning speed of the triple flame in terms of , S, and R. In particular we describe how the propagation speed of the front is decreased by an increase in R and how the location of its leading edge is affected by reversibility. For example, it is found that the leading edge shifts towards the fuel stream for S > 1 and towards the oxidiser if S < 1, as R is increased. A detailed numerical study is conducted covering all propa

Who reads Effect of the Reversibility of the Chemical Reaction on Triple Flames?

Author

Samina Ali; Joel Daou

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd; Elsevier BV (ISSN 1540-7489)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)