Modeling of solidification and velocity of atomized molten oroplet during atomization and sary forming

摘要

The solidification behaviors and velocity of atomized droplets during flight is formulated by a mathematical model,in whihc the concept of transient nucleation is applied.During the flight,the droplet velocity shows a maximum,followed by an inflection phenomenon.The velocity of large droplet is lower than that of small droplet at shorter flight distance,and higher than that of small droplet t longer flight distance.the effect of the gas flow pattern is more significant at longer flight distnace than at shorter flight distance At a given flight distance,large droplet has higher temperatue than small droplets prior to nucleation.Lare droplet has higher nucleation temperature than small droplet.medium size droplet flies over the shortest flight distance before the nucleation stars.At ht eend of recalscene,large droplet has less solid fraction than small droplet has.