Abstract

Theoretical analyses are reported on the combustion of spherical alcohol droplets under microgravity conditions. The theory addresses burning rates, water dissolution in the droplet during combustion, possible instabilities that can lead to liquid-phase circulation, and conditions for flame extinction. Comparisons are made between theoretical predictions and results of drop-tower experiments. The primary conclusions are that internal circulation occurs for methanol droplets and that the extinction conditions predicted under this assumption agree with experiment.

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