We consider here the effects of gas-phase turbulence on the evaporation dynamics of a polydispersed dilute spray in a "jet-stirred" well-mixed vessel. Turbulence generally increases the rate of heat diffusion-controlled droplet evaporation but the time-averaged augmentation factor is expected to be sensitive to droplet size----in part because of the roles of droplet inertia and drag reduction associated with the evaporation process itself. Consequently, each droplet in an evaporating population will not be characterized by the same rate of area change even in the same mean environment. When these physical phenomena are convoluted with the residence time distribution characterizing a well-mixed vessel (eg., simulating the primary zone of an aircraft gas turbine combustor) we predict the resulting fuel spray fraction evaporated, evaporation rate-controlled combustion "intensity" (eg. GW/m^3), and the corresponding exit droplet size distribution (DSD).

While such multiphase chemical reactors nominally perform as though the characteristic evaporation rate Damkohler number (eg. /tvap,ref based on Sauter mean droplet diameter and mean vapor-phase residence time) has been turbulence-enhanced, we also show that characteristic droplet size distribution "distortions" can be expected, especially when the fuel droplet Stokes number

tp(SMD)/(t)EBU is "super-critical". By exploiting a recently proposed/investigated idealized spray combustor model (Rosner, Arias-Zugasti and Labowsky(ChE Sci(in press(2008)), these phenomena are illustrated and quantified for the case of a kerosene-like log-normal fuel spray injected into an adiabatic combustor supplied with a near-stoichiometric compressed air-flow.