Plif species and ratiometric temperature measurements of aluminum particle combustion in O2, CO2 and N2O oxidizers, and comparison with model calculations

P. Bucher, R. A. Yetter, F. L. Dryer, T. P. Parr, D. M. Hanson-Parr

Research output: Contribution to journalConference articlepeer-review

84 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2421-2429
Number of pages9
JournalSymposium (International) on Combustion
Volume27
Issue number2
DOIs
StatePublished - 1998
Event27th International Symposium on Combustion - Boulder, CO, United States
Duration: Aug 2 1998Aug 7 1998

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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