Abstract
Abstract A new theoretical study of counterflow spray diffusion flames is presented. The fuel is introduced into the system in the form of liquid droplets suspended homogeneously in an inert environment. Analytic solutions are developed for the entire range of injection velocities, including large rates of injection for which asymptotic expansions based on the reciprocal of the injection velocity are involved. The sensitivity of flame position and temperature to combined transport, vaporization and liquid fuel spray-related and injection rate effects is analyzed in a comprehensive study of calculated results. These results were obtained assuming an infinite chemical Damkohler number so that the flame appears as a thin front. Additional numerically computed results with finite rate chemical kinetics show that the presence of the spray of vaporizing droplets tends to make flame extinguishment easier and ignition more difficult than in the single gas-phase counterflow diffusion flame situation.
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