Mathematical Modeling of Single Droplet Trajectories in Combustor Flow Fields

摘要

The report describes mathematical modeling and experimental work to examine the behavior of individual fuel droplets sprayed into a combustor, to determine the parameters that could influence incinerator effectiveness. A computer model has been developed to predict the motion, heating, and evaporation of such a droplet in a heated environment. The gas flow field can be specified with mean velocities or a randomly fluctuating turbulent field, based on experimental values for the standard deviation of the velocity. Numerical predictions of the initial heating and evaporation of an isolated burning droplet are compared to experimental results. The predictions, which utilized measured temperature and velocity gas fields, compared well to experimental observations. The correlation of droplet penetration with droplet incineration suggests that incinerator failure modes may be predicted on the basis of droplet atomization parameters and gas field conditions.