High enthalpy source dedicated to quantitative infrared emission spectroscopy of gas flows at elevated temperatures
Résumé
The High Enthalpy Source (HES) is a novel high temperature source developed to measure infrared line-by-line integrated absorption cross sections of flowing gases up to 2000 K. The HES relies on a porous graphite furnace designed to uniformly heat a constant flow of gas. The flow compensates thermal dissociation by renewing continuously the gas sample and eliminating dissociation products. The flowing characteristics have been investigated using computational fluid dynamics simulation confirming good temperature uniformity. The HES has been coupled to a high-resolution Fourier transform spectrometer to record emission spectra of methane at temperatures ranging between 700 and 1400 K. A radiative model has been developed to extract absolute line intensities from the recorded spectra. © 2019 Author(s).
Mots clés
Temperature uniformity
Thermal dissociation
Dissociation
Emission spectroscopy
Enthalpy
Fourier transform infrared spectroscopy
Spectrometers
Absolute line intensities
Absorption cross sections
Computational fluid dynamics simulations
Dissociation products
Fourier transform spectrometers
Infrared emission spectroscopy
Computational fluid dynamics
Flow of gases
Molecular physics
CRESU
Domaines
Physique [physics]
Fichier principal
R. Georges-2019-High Enthalpy Source dedicated to quantitative infrared emission spectroscopy of gas flows at elevated temperatures.pdf (2.05 Mo)
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| Origine | Fichiers produits par l'(les) auteur(s) |
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