A MODEL FOR ASSESSING FUEL JETTISONING EFFECTS

The present effort addresses the technical issues associated with hydr ocarbon fuel jettisoning from aircraft, including the adaptation of an existing aerial application model For pesticide deposition. The analy sis produces qualitatively and quantitatively reasonable results both in multicomponent evaporation calculations for isolated droplets, as w ell as in fully coupled calculations of airborne fuel jettisoning. Bot h classes of computations confirm earlier conclusions that the likely groundfall of JP-8 jet fuel is substantially higher than the more vola tile JP-4 jet fuel, and reiterate the need for a careful assessment of the environmental impact of fuel jettisoning events involving JP-8. T he preliminary model appears to be a suitable starting point for full- scale development of a flexible, practical fuel jettisoning simulation code.