Numerical Simulation Modeling of Aluminum Burning for Heavily Aluminized HE

The objective of this investigation is to model the burning of aluminum particles. An aluminum evaporation/reaction model was incorporated within a multi-phase flow model. The new scheme was applied to the simulation of blast wave evolution, where the HE model includes a significant percentage of aluminum particles, whose long-time burning and energy release must be considered. The evaporation of small aluminum particles with diameters from 5 to 500micron, reacting with oxygen, water, and carbon dioxide was initially tested in a 1-D code. The pressure profiles were significantly different than those obtained an inert aluminum model and from a single-reaction model which only considered a reaction with oxygen. Once validated, the models from 1-D code were incorporated into a 3-D production code. The newly developed 3D flow that includes the aluminum burning model was compared with experimental data. Results with the new model showed very good agreement in terms of the blast evolution, pressure, impulse, and energy behind the wave.