  Aspects of predictions of activation-energy asymptotics concerning the
dependence of the burning velocity on the equivalence ratio are examined here
through both asymptotic analyses and numerical computation. In typical
hydrocarbon-air flames, the burning velocity achieves its maximum value for
fuel-rich mixture, the cause being generally attributed to the effects of
detailed chemical kinetics and unequal diffusivities of the reactants. The
present results demonstrate the possibility of this attribute of the burning
velocity occurring even when these two effects are absent. This is accomplished
by parametrically studying the burning-velocity formula valid for all
equivalence ratios under the conditions specified in the title of this article,
with special attention paid to implications for hydrocarbon-air flames.
