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Autoignition of Single Droplets of Two-Component Liquid Fuels

机译：双组分液体燃料单液滴的自燃

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Measurements and predictions of the ignition delay time of single droplets ofseveral 2-component mixtures at atmospheric pressure are presented. The model used to predict ignition delay time for 2-component fuel droplets is an extension of that developed by Bergeron and Hallett (1988) for single-component fuels. The model solves the full transient equations of continuity, fuel species diffusion, and energy in the vapor phase using finite difference techniques. The chemical reaction rate is calculated using a one-step global reaction model, with means for combining pure component rate data to an expression for a mixture. Experiments were performed using the suspended droplet technique, and results are presented for various n-paraffin mixtures. The results show that ignition is controlled by the more volatile component of the mixture. The ignition delay time is found to be nearly independent of species transport in the liquid phase. Mixture reaction rates are shown to be adequately modelled by simple linear combination of component rate data.

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