Interference free spontaneous Raman spectroscopy for measurements in rich hydrocarbon flames

G. Magnotti; D. Geyer; R. S. Barlow

doi:10.1016/j.proci.2014.05.076

Interference free spontaneous Raman spectroscopy for measurements in rich hydrocarbon flames

G. Magnotti^*, D. Geyer, R. S. Barlow

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

The capability to simultaneously acquire two orthogonal components of a Raman spectrum has been added to the Sandia Raman/Rayleigh/CO-LIF instrument for combustion measurements. This addition allows removing unpolarized fluorescence interference signal from Raman spectra, extending the applicability of the instrument to rich hydrocarbon flames. The optical set-up and the data analysis approach are described. The instrument is tested in challenging rich laminar and turbulent CH₄/air flames, deemed inaccessible with the previous instrument. Experimental results show good agreement with laminar calculations performed with Chemkin. The approach also avoids the cumbersome calibration and correction procedures required for data collected with the previous version of the instrument in presence of mild fluorescence interference. The drawback is a drop in the instrument precision, in particular for CO₂ and O₂ concentrations.

Original language	English (US)
Pages (from-to)	3765-3772
Number of pages	8
Journal	Proceedings of the Combustion Institute
Volume	35
Issue number	3
DOIs	https://doi.org/10.1016/j.proci.2014.05.076
State	Published - 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Keywords

1D Raman spectroscopy
Diagnostics
Interference
Turbulent flames

ASJC Scopus subject areas

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

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10.1016/j.proci.2014.05.076

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title = "Interference free spontaneous Raman spectroscopy for measurements in rich hydrocarbon flames",

abstract = "The capability to simultaneously acquire two orthogonal components of a Raman spectrum has been added to the Sandia Raman/Rayleigh/CO-LIF instrument for combustion measurements. This addition allows removing unpolarized fluorescence interference signal from Raman spectra, extending the applicability of the instrument to rich hydrocarbon flames. The optical set-up and the data analysis approach are described. The instrument is tested in challenging rich laminar and turbulent CH4/air flames, deemed inaccessible with the previous instrument. Experimental results show good agreement with laminar calculations performed with Chemkin. The approach also avoids the cumbersome calibration and correction procedures required for data collected with the previous version of the instrument in presence of mild fluorescence interference. The drawback is a drop in the instrument precision, in particular for CO2 and O2 concentrations.",

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AU - Magnotti, G.

AU - Geyer, D.

AU - Barlow, R. S.

PY - 2015

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N2 - The capability to simultaneously acquire two orthogonal components of a Raman spectrum has been added to the Sandia Raman/Rayleigh/CO-LIF instrument for combustion measurements. This addition allows removing unpolarized fluorescence interference signal from Raman spectra, extending the applicability of the instrument to rich hydrocarbon flames. The optical set-up and the data analysis approach are described. The instrument is tested in challenging rich laminar and turbulent CH4/air flames, deemed inaccessible with the previous instrument. Experimental results show good agreement with laminar calculations performed with Chemkin. The approach also avoids the cumbersome calibration and correction procedures required for data collected with the previous version of the instrument in presence of mild fluorescence interference. The drawback is a drop in the instrument precision, in particular for CO2 and O2 concentrations.

AB - The capability to simultaneously acquire two orthogonal components of a Raman spectrum has been added to the Sandia Raman/Rayleigh/CO-LIF instrument for combustion measurements. This addition allows removing unpolarized fluorescence interference signal from Raman spectra, extending the applicability of the instrument to rich hydrocarbon flames. The optical set-up and the data analysis approach are described. The instrument is tested in challenging rich laminar and turbulent CH4/air flames, deemed inaccessible with the previous instrument. Experimental results show good agreement with laminar calculations performed with Chemkin. The approach also avoids the cumbersome calibration and correction procedures required for data collected with the previous version of the instrument in presence of mild fluorescence interference. The drawback is a drop in the instrument precision, in particular for CO2 and O2 concentrations.

KW - 1D Raman spectroscopy

KW - Diagnostics

KW - Interference

KW - Turbulent flames

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M3 - Article

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JF - Proceedings of the Combustion Institute

IS - 3

ER -

Interference free spontaneous Raman spectroscopy for measurements in rich hydrocarbon flames

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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