Abstract
An experimental effort to understand the contribution of turbulence to the evaporation rate of fuel droplets has been performed with particular attention to conditions when the turbulence scale is smaller than the droplet diameter. N-heptane has been chosen as working fluid to give measurable evaporation rates from droplet images over relatively short experiment times. An active turbulence grid wind tunnel is built for the requirements of this experiment. A camera triggered by a pulse generator takes images of the droplets pinned on wires across the tunnel. The results show a small increase in evaporation rate with increasing turbulence intensity, and that mean flow around the droplets has more impact on evaporation than does the turbulence state.
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