Abstract
A computational model of air atomization has been developed to predict the size and velocity of fuel droplets near the exit of air-assisted hollow-cone injectors. In this model, stratified two-phase flow in the injectors and breakup of liquid film into small droplets are considered. The model shows that Sauter mean diameter of droplets is proportional to (liquid film thickness)1/3 and (liquid surface tension/dynamic pressure defined by relative velocity between liquid and air)2/3. Droplet size measurements were conducted to determine the proportionality constant for a realistic injector. The effects of operating conditions of the injectors on the droplet size and velocity will be predicted using this model.
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