TY - JOUR
T1 - Plif species and ratiometric temperature measurements of aluminum particle combustion in O2, CO2 and N2O oxidizers, and comparison with model calculations
AU - Bucher, P.
AU - Yetter, R. A.
AU - Dryer, F. L.
AU - Parr, T. P.
AU - Hanson-Parr, D. M.
N1 - Funding Information:
This work was supported by the Office of Naval Research under Contracts N00014-93-1-0732 and N00014-95-1-1339. The authors gratefully thank Dr. Richard Miller at ONR for funding this work. The skilled experimental assistance of Mr. Bernhard Klotz is gratefully appreciated.
PY - 1998
Y1 - 1998
N2 - Planar laser-induced fluorescence (PLIF) was used to probe the flame structure about single, isolated aluminum particles burning in pure gases of CO2 and N2O and gas mixtures of O2, N 2 , and Ar at near atmospheric pressures. Temporally resolved temperature measurements were obtained by a two-camera two-excitation-line PLIF technique. To aid the interpretation of the experimental results, a detailed, diffusionally controlled local equilibrium model of aluminum particle combustion was developed. AlO was found to be a gas-phase intermediate in all combustion environments studied. The measurements confirm the concept of a "limit temperature" in metal combustion and support the local equilibrium model. The model predicts the pressure dependence of the mass burning rate found in the literature. Contrary to previous explanations, this pressure sensitivity was found to originate from the pressure dependence of the gasification temperature of Al and decomposition temperature of Al2O3(1). Both experiment and model indicate the importance of nitrogen as a reactant.
AB - Planar laser-induced fluorescence (PLIF) was used to probe the flame structure about single, isolated aluminum particles burning in pure gases of CO2 and N2O and gas mixtures of O2, N 2 , and Ar at near atmospheric pressures. Temporally resolved temperature measurements were obtained by a two-camera two-excitation-line PLIF technique. To aid the interpretation of the experimental results, a detailed, diffusionally controlled local equilibrium model of aluminum particle combustion was developed. AlO was found to be a gas-phase intermediate in all combustion environments studied. The measurements confirm the concept of a "limit temperature" in metal combustion and support the local equilibrium model. The model predicts the pressure dependence of the mass burning rate found in the literature. Contrary to previous explanations, this pressure sensitivity was found to originate from the pressure dependence of the gasification temperature of Al and decomposition temperature of Al2O3(1). Both experiment and model indicate the importance of nitrogen as a reactant.
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U2 - 10.1016/S0082-0784(98)80094-5
DO - 10.1016/S0082-0784(98)80094-5
M3 - Conference article
AN - SCOPUS:0032265791
SN - 0082-0784
VL - 27
SP - 2421
EP - 2429
JO - Symposium (International) on Combustion
JF - Symposium (International) on Combustion
IS - 2
T2 - 27th International Symposium on Combustion
Y2 - 2 August 1998 through 7 August 1998
ER -