Droplet dispersion, velocity and vaporization in heated and unheated jets

Monodisperse droplets of pentane and hexadecane are injected into the centerline of an air jet and their radial displacement and axial velocity are measured as a function of axial position and time of flight. From these measurements, dispersion rates and velocity statistics are obtained. Measurements of droplet size allow mean gasification rates to be estimated for pentane droplets. Measurements are presented for heated (60 C) and unheated (20 C) air jets using both liquids. Analogous simulations of droplet trajectories are carried out to compute dispersion and velocity statistics. The droplet-gas interaction utilizes a Monte Carlo approach to sample the flowfield turbulence.