Determination of temperature and concentrations of main components in flames by fitting measured Raman spectra

A. V. Sepman*, V.V. Toro, A. V. Mokhov, H. B. Levinsky

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

The procedure of deriving flame temperature and major species concentrations by fitting measured Raman spectra in hydrocarbon flames is described. The approach simplifies the calibration procedure to determine temperature and major species concentrations from the measured Raman spectra. The calculations of the Raman spectra are performed using data online positions and cross sections from the current literature. Utilizing all spectral information for deriving temperature and major species concentrations substantially increases accuracy, while interferences can easily be detected and filtered out of the measured spectrum. Temperatures from the separate Raman spectra of N-2, H2O, O-2, CO2 and CO are systematically compared with each other over the span of more than 1,700 K. The agreement between them is generally better than 100 K. The developed procedure also allows us to determine the mole fractions of the major species with absolute accuracy of +/- 10 %.

Original languageEnglish
Pages (from-to)35-47
Number of pages13
JournalApplied Physics B-Lasers and Optics
Volume112
Issue number1
DOIs
Publication statusPublished - Aug-2013

Keywords

  • CROSS-SECTIONS
  • SCATTERING
  • SPECTROSCOPY
  • INTENSITIES
  • COMBUSTION
  • METHANE
  • GASES
  • CO2
  • SIMULATION
  • MOLECULES

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