A Consideration on the Relation between Laminar Burning Velocity and Ignition Delay

概要

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Because of the complexity of the chemical reactions involved, any current theory of premixed laminar flame cannot absolutely predict the burning velocity. In the present study, based on the analogy between the reactions in the combustion wave and those in the ignition process at a homogeneous mixture, a tentative theoretical model has been established to permit the prediction of the burning velocity from the ignition-delay data. Essentially, this model takes the following matters into consideration; the one is the history of temperature to which a portion of the mixture is submitted during the preheating zone, and the other the broadening of the ignition point caused by the diffusion of chemical species. Applied to methane-air mixture, comparisons of the predicted burning velocities with the measured ones under various conditions have shown a fairly good agreement, suggesting that the proposed model is essentially correct.
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