Experimental and numerical study in evaporation of hydrocarbon droplet surface temperature

Abstract

Time evolution of droplet radius regression and surface temperature are studied experimentally and numerically by evaporating a single droplet of pure fuel or fuel mixture in either hot air flow or natural convection. The droplet was suspended on a capillary setup inside the test section of a thermal wind-tunnel. A video system and an infrared camera recorded video and thermal images during droplet evaporation sequences. The model of the "film theory" based on conservation equations is used and experiments are compared to calculations for several heptane-decane or octane-hexane mixtures and for pure products. The experimental data are in good agreement with the calculated results.