Abstract
The study of the combustion of a droplet of liquid sodium has been made possible thanks to a novel technique which samples the pure molten metal and keeps it free of contamination until released in a heated furnace in a controlled oxidizing atmosphere. Sixteen mm motion pictures were obtained and frame-by-frame examination made it possible to observe a vaporphase diffusion flame separated from the droplet by a visible dead space. This is adequately described by a concentric zones model. Burning rates and evaporation constants have been computed for different temperatures and oxygen mole fractions ranging from 0.1–0.5. The experimental results are interpreted by considering oxygen diffusion to be the rate-determining step.
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