FLAME PROPAGATION WITH MULTIPLE FUELS.

The steady propagation of a flame through a premixed combustible mixture is studied for the case in which the mixture consists of two distinct fuels. The overall chemical reaction mechanism is represented by $A + \nu_A O \to \mu _A P,B + \nu_B O \to \mu _B Q$, where A and B denote the fuels, O is the oxidizer, P and Q are the corresponding products, and $\nu_A ,\mu _A ,\nu_B ,\mu _B $, are stoichiometric coefficients. We employ the method of matched asymptotic expansions to derive a solution for large activation energies, in which case both chemical reactions are confined to a thin layer. The (small) separation distance H between the points where the two reactions go to completion and the propagation velocity U are determined as functions of such quantities as Lewis numbers, activation energies, Damkohler numbers and heat release fractions. The formula for H represents a relative measure of the flame thickness in terms of standard parameters, while that for U determines the role of each reaction in the ov...

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