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

    21 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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