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Advisor(s)
Abstract(s)
The self-propagating high temperature reactions, as the Fez03/AI thermite
combustion, are hard to follow by experimentation due to the extreme
conditions that characterize them. Hence, theoretical prediction of these
processes represents a valuable guideline for experimental work.
The availability of experimental results of radial combustion on disk shaped
samples (Durães et aI., 2006a) has stimulated the derivation of a onedimensional
model to describe the FeZ03/AI combustion radial propagation
(Durães et aI., 2006b). This model considers non-steady combustion
propagation on thin circular samples of FeZ03/AI mixtures, zero order kinetics
and conductive/radiative heat transfer. Ali the properties of the system vary with
the temperature and composition during the propagation. Phase transitions are
also contemplated. These last features allowed the obtainment of realistic
solutions, readily comparable with the experimental values presented in Durães
et aI. (2006a). Adaptive numerical methods were applied in the resolution. The
solution profiles are fast moving steep fronts, which were validated by
experimental results in Durães et aI. (2006b). The experimental combustion
velocities were used to adjust the kinetic constant of the model, in order to give
ita good predictive capability.
Description
Keywords
Combustion Fe2O3/Al thermite Simulation Sensitivity analysis
Citation
Brito, Paulo; Durães, Luísa; Campos, José; Portugal, António (2006). Simulation of Fe2O3/Al combustion: sensitivity analysis. In 19º International Symposium on Chemical Reaction Engineering. Berlin, Germany. p. 297-298.