COMBUSTION OF A SINGLE DROPLET IN THE PRESENCE OF AN OSCILLATING FLOW

The two-dimensional, unsteady, laminar conservation equations for mass , momentum, energy and species transport in the gas phase are solved n umerically in spherical coordinates. This is to study the heat and the mass transfer, and the combustion around a single spherical droplet. The droplet mass and momentum equations are also solved simultaneously with the gas phase equations in order to investigate the effects of d roplet entrainment in the oscillating flow with and without a steady v elocity. The numerical solution for a single droplet combustion gives the droplet diameter variation as well as the gas phase velocity, temp erature and species concentrations as a function of time. The effects of frequency, amplitude of oscillating flow, velocity ratio of oscilla ting flow amplitude to the steady velocity, ambient temperature and in itial droplet diameter on the droplet combustion are also investigated . The droplet burning history is not governed by the d(2)-law in the p resence of oscillating flow, unlike to the case under quiescent ambien t conditions.