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Laser-induced breakdown flame thermometry

Kiefer, Johannes; Troeger, Johannes W.; Li, Zhongshan LU ; Seeger, Thomas; Aldén, Marcus LU and Leipertz, Alfred (2012) In Combustion and Flame 159(12). p.3576-3582
Abstract
The determination of temperature distribution is an essential task when flames are characterized. We propose a new approach for flame thermometry based on laser-induced breakdown spectroscopy (LIBS) utilizing the temperature dependency of the breakdown threshold laser pulse energy. Calibration measurements are carried out in heated gas flows and post-combustion gases. Compositional effects on the breakdown threshold are corrected employing a straightforward procedure. For this purpose, the elemental composition is derived from the LIBS spectra and this information is then used for correcting the measured threshold laser pulse energy. A series of proof-of-concept measurements in a laminar methane/air flame on a Bunsen burner is conducted... (More)
The determination of temperature distribution is an essential task when flames are characterized. We propose a new approach for flame thermometry based on laser-induced breakdown spectroscopy (LIBS) utilizing the temperature dependency of the breakdown threshold laser pulse energy. Calibration measurements are carried out in heated gas flows and post-combustion gases. Compositional effects on the breakdown threshold are corrected employing a straightforward procedure. For this purpose, the elemental composition is derived from the LIBS spectra and this information is then used for correcting the measured threshold laser pulse energy. A series of proof-of-concept measurements in a laminar methane/air flame on a Bunsen burner is conducted and compared to reference data from coherent anti-Stokes Raman scattering (CARS). The corrected LIBS temperatures show excellent agreement with those obtained by CARS. Therefore, our approach represents a simple and straightforward alternative to traditionally used thermometry methods. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Laser-induced breakdown spectroscopy, Temperature, Composition, Plasma, Laminar flames
in
Combustion and Flame
volume
159
issue
12
pages
3576 - 3582
publisher
Elsevier
external identifiers
  • wos:000310656600012
  • scopus:84867912877
ISSN
0010-2180
DOI
10.1016/j.combustflame.2012.08.005
language
English
LU publication?
yes
id
7c6b3a0b-f36f-44e7-8993-5d06caaaa5fb (old id 3283373)
date added to LUP
2012-12-20 12:13:18
date last changed
2017-08-20 04:10:50
@article{7c6b3a0b-f36f-44e7-8993-5d06caaaa5fb,
  abstract     = {The determination of temperature distribution is an essential task when flames are characterized. We propose a new approach for flame thermometry based on laser-induced breakdown spectroscopy (LIBS) utilizing the temperature dependency of the breakdown threshold laser pulse energy. Calibration measurements are carried out in heated gas flows and post-combustion gases. Compositional effects on the breakdown threshold are corrected employing a straightforward procedure. For this purpose, the elemental composition is derived from the LIBS spectra and this information is then used for correcting the measured threshold laser pulse energy. A series of proof-of-concept measurements in a laminar methane/air flame on a Bunsen burner is conducted and compared to reference data from coherent anti-Stokes Raman scattering (CARS). The corrected LIBS temperatures show excellent agreement with those obtained by CARS. Therefore, our approach represents a simple and straightforward alternative to traditionally used thermometry methods. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.},
  author       = {Kiefer, Johannes and Troeger, Johannes W. and Li, Zhongshan and Seeger, Thomas and Aldén, Marcus and Leipertz, Alfred},
  issn         = {0010-2180},
  keyword      = {Laser-induced breakdown spectroscopy,Temperature,Composition,Plasma,Laminar flames},
  language     = {eng},
  number       = {12},
  pages        = {3576--3582},
  publisher    = {Elsevier},
  series       = {Combustion and Flame},
  title        = {Laser-induced breakdown flame thermometry},
  url          = {http://dx.doi.org/10.1016/j.combustflame.2012.08.005},
  volume       = {159},
  year         = {2012},
}