An experimental set-up is developed to investigate the burning of levi
tated aluminum particles ignited by a CO2 laser in air under high pres
sure conditions. Residence times of aluminum particles burning in the
electrodynamic levitator are long enough to observe the total burning
process, under normal and high pressures. Experiments allow to measure
the ignition delay and the burning times of aluminum particles. These
measurements and the accompanying high speed images give useful infor
mation on the burning processes of aluminum particles under Various re
gimes. A numerical model is also developed to predict the burning rate
s of aluminum particles and the sizes of the alumina residues.