Abstract
Droplet combustion experiments have been performed in microgravity as fundamental researches on spray combustion. Relatively large droplets (about 1mm) were used in order to obtain high resolutions in time and space although fine droplets burns in real spray combustors. In the present paper, scale effects in droplet and spray combustion were discussed. Under diffusion-controlled conditions, the phenomena for different initial droplet diameter are similar to each other. Deteriorations of the similarity are found in ignition and microexplosion of fine droplets and in droplet-flow interaction.
