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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 33,
  • Issue 1,
  • pp. 41-45
  • (1979)

Theoretical Fitting of Computer Processed Laser Raman Spectra from Methane- and Propane-Air Flames

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Abstract

A technique for rapid acquisition and computer processing of Raman signals is described for probing premixed laminar hydrocarbon-air flames using laser Raman spectroscopy. Temperatures can be determined to within ±50°K by fitting the observed N<sub>2</sub> spectrum at any point in the flame. Fits to the spectra of O<sub>2</sub>, CO, H<sub>2</sub>, and CO<sub>2</sub> are used to measure their mole fractions at the calculated N<sub>2</sub> temperature. For the remaining polyatomic species, the total area under the peak is the primary measure of their concentration.

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