Temperature measurements of aluminum particles burning in carbon dioxide

Nick Glumac, Herman Krier, Tim Bazyn, Ryan Ever

Research output: Contribution to journalArticlepeer-review

Abstract

Aluminum particles are often added to solid propellants and explosives to enhance energy release, where the metal typically burns in mixtures of water vapor and carbon dioxide. In this study, information about the temperature field surrounding 5-10-μm aluminum particles burning at elevated pressure in CO2/Ar and CO2/N2 is obtained via emission and absorption spectroscopy of AlO and three-color pyrometry. Spectra of AlO fit well to Boltzmann distributions and to similar temperatures of 3000 to 3200 K in both excited and ground states, suggesting that both states are in equilibrium. Pyrometry yields slightly lower temperatures, in the range of 3000 to 3100K. Both temperature ranges are well below the adiabatic flame temperature and the boiling point of alumina but are much closer to the predicted aluminum boiling temperature at elevated pressure. These results are consistent with a flame structure with combustion occurring at or very near the particle surface.

Original languageEnglish (US)
Pages (from-to)485-511
Number of pages27
JournalCombustion science and technology
Volume177
Issue number3
DOIs
StatePublished - Mar 1 2005

Keywords

  • Aluminum
  • Carbon dioxide
  • Emission spectroscopy
  • Pyrometry
  • Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Temperature measurements of aluminum particles burning in carbon dioxide'. Together they form a unique fingerprint.

Cite this