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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v3.i1-6.220
pages 209-226

FT-IR SPECTROMETRY OF LAMINAR, PREMIXED HYDROCARBON/AIR FLAMES

I. T. Huang
Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802, U.S.A.
Stefan T. Thynell
Department of Mechanical Engineering, The Pennsylvania State University University Park, PA 16802

RÉSUMÉ

A non-intrusive diagnostic technique based on FT-IR spectrometry has been developed for the purpose of determining the combustion and sooting characteristics of premixed hydrocarbon/oxidizer flames. During the course of its development, a new analytical approach was derived for evaluating a complex integral required in correcting for FT-IR instrumental effects. Temperature profiles above the burner surface were determined using the fundamental band of CO and the ν3-band of CO2. These profiles were found to be in good agreement with temperature profiles obtained using fine-wire thermocouples. Absolute species concentrations of CO, CO2, and H2O were deduced by employing a least-square fitting approach to the measured line intensities based on data available in the literature. To characterize the amount of unburned fuel in the mixture, the absolute concentration profiles of the fuel were deduced from band absorbance data generated using a high-temperature furnace. Profiles of relative soot concentration above the burner surface were also determined.


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