Abstract
This study provides new data regarding the burning dynamics of a thin oil layer on a water surface with carefully controlled turbulence intensity. The turbulent water surface is generated using a unique experimental platform comprising an axisymmetric upward-pointing submerged jet, an approach used in studies of free-surface turbulence. The turbulence is isotropic in the horizontal plane and bulk-flow free, with turbulence intensity u′ ranging from 0.017−0.035 m/s comparable to water turbulence in calm oceans. The experiments revealed a strong dependence on the burning rate of the oil layer with the turbulence intensity of the water surface. Increasing turbulence increased the heat transfer rate at the oil-water interface, reducing the burning rate. Results were modeled using a 1-D heat transfer model, where heat loss to the turbulent water was analyzed by an experimentally determined convective heat transfer coefficient. The coupling with the gas phase heat transfer was achieved using a parameter χ representing the fraction of heat release fed back to the fuel.
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