A method for performing high accuracy temperature measurements in low-pressure sooting flames using two-line atomic fluorescence

Iain S. Burns, Xavier Mercier, Maxime Wartel, Robin S.M. Chrystie, J. Hult, C.F. Kaminski

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We demonstrate a step change in the capability of diode laser excited two-line atomic fluorescence (TLAF) thermometry and show it is well-suited to the study of low-pressure sooting flames. The new developments to the technique reported here were essential to achieve the accuracy (+/-41 K) and precision (+/-8 K) required for useful measurements in such systems. This represents the first application of TLAF thermometry to the investigation of low-pressure sooting flames, an environment in which other thermometry techniques perform poorly. We thus demonstrate a practical application of diode laser TLAF to a burner that is the subject of a coordinated experimental and computational investigation of soot formation. The TLAF technique requires no calibration measurement and is compact and economical to set up in comparison with traditional laser thermometry methods. Temperature profiles were recorded in a laminar flat-flame operating on O-2, N-2 and CH4 at fuel equivalence ratio of 2.32 and pressures ranging from 18.7 to 26.7 kPa. Almost identical temperature profiles were observed at different pressures despite the fact that soot volume fractions changed by more than an order of magnitude between the lowest and highest operating pressures. The data will contribute to modelling efforts to understand the surprisingly strong dependence of soot volume fraction on pressure that has previously been observed under the range of conditions studied here and will be included in an openly available database on this flame, which includes species profile measurements obtained by other methods. In the current contribution we emphasise the technical implementation of diode TLAF as a new temperature diagnostic with near optimal characteristics for the study of low pressure, sooting flames. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)799-806
Number of pages8
JournalProceedings of the Combustion Institute
Volume33
Issue number1
Early online date5 Aug 2010
DOIs
Publication statusPublished - 2011

Fingerprint

Temperature measurement
temperature measurement
flames
low pressure
Fluorescence
soot
fluorescence
Soot
temperature profiles
semiconductor lasers
Semiconductor lasers
Volume fraction
burners
equivalence
diodes
Fuel burners
Temperature
Diodes
profiles
Calibration

Keywords

  • soot
  • temperature
  • diode laser
  • low-pressure flame
  • laser-induced fluorescence
  • LIF thermometry
  • spectroscopy
  • spectrometry
  • diagnostics

Cite this

Burns, Iain S. ; Mercier, Xavier ; Wartel, Maxime ; Chrystie, Robin S.M. ; Hult, J. ; Kaminski, C.F. / A method for performing high accuracy temperature measurements in low-pressure sooting flames using two-line atomic fluorescence. In: Proceedings of the Combustion Institute. 2011 ; Vol. 33, No. 1. pp. 799-806.
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abstract = "We demonstrate a step change in the capability of diode laser excited two-line atomic fluorescence (TLAF) thermometry and show it is well-suited to the study of low-pressure sooting flames. The new developments to the technique reported here were essential to achieve the accuracy (+/-41 K) and precision (+/-8 K) required for useful measurements in such systems. This represents the first application of TLAF thermometry to the investigation of low-pressure sooting flames, an environment in which other thermometry techniques perform poorly. We thus demonstrate a practical application of diode laser TLAF to a burner that is the subject of a coordinated experimental and computational investigation of soot formation. The TLAF technique requires no calibration measurement and is compact and economical to set up in comparison with traditional laser thermometry methods. Temperature profiles were recorded in a laminar flat-flame operating on O-2, N-2 and CH4 at fuel equivalence ratio of 2.32 and pressures ranging from 18.7 to 26.7 kPa. Almost identical temperature profiles were observed at different pressures despite the fact that soot volume fractions changed by more than an order of magnitude between the lowest and highest operating pressures. The data will contribute to modelling efforts to understand the surprisingly strong dependence of soot volume fraction on pressure that has previously been observed under the range of conditions studied here and will be included in an openly available database on this flame, which includes species profile measurements obtained by other methods. In the current contribution we emphasise the technical implementation of diode TLAF as a new temperature diagnostic with near optimal characteristics for the study of low pressure, sooting flames. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.",
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A method for performing high accuracy temperature measurements in low-pressure sooting flames using two-line atomic fluorescence. / Burns, Iain S.; Mercier, Xavier; Wartel, Maxime; Chrystie, Robin S.M.; Hult, J.; Kaminski, C.F.

In: Proceedings of the Combustion Institute, Vol. 33, No. 1, 2011, p. 799-806.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A method for performing high accuracy temperature measurements in low-pressure sooting flames using two-line atomic fluorescence

AU - Burns, Iain S.

AU - Mercier, Xavier

AU - Wartel, Maxime

AU - Chrystie, Robin S.M.

AU - Hult, J.

AU - Kaminski, C.F.

PY - 2011

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N2 - We demonstrate a step change in the capability of diode laser excited two-line atomic fluorescence (TLAF) thermometry and show it is well-suited to the study of low-pressure sooting flames. The new developments to the technique reported here were essential to achieve the accuracy (+/-41 K) and precision (+/-8 K) required for useful measurements in such systems. This represents the first application of TLAF thermometry to the investigation of low-pressure sooting flames, an environment in which other thermometry techniques perform poorly. We thus demonstrate a practical application of diode laser TLAF to a burner that is the subject of a coordinated experimental and computational investigation of soot formation. The TLAF technique requires no calibration measurement and is compact and economical to set up in comparison with traditional laser thermometry methods. Temperature profiles were recorded in a laminar flat-flame operating on O-2, N-2 and CH4 at fuel equivalence ratio of 2.32 and pressures ranging from 18.7 to 26.7 kPa. Almost identical temperature profiles were observed at different pressures despite the fact that soot volume fractions changed by more than an order of magnitude between the lowest and highest operating pressures. The data will contribute to modelling efforts to understand the surprisingly strong dependence of soot volume fraction on pressure that has previously been observed under the range of conditions studied here and will be included in an openly available database on this flame, which includes species profile measurements obtained by other methods. In the current contribution we emphasise the technical implementation of diode TLAF as a new temperature diagnostic with near optimal characteristics for the study of low pressure, sooting flames. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

AB - We demonstrate a step change in the capability of diode laser excited two-line atomic fluorescence (TLAF) thermometry and show it is well-suited to the study of low-pressure sooting flames. The new developments to the technique reported here were essential to achieve the accuracy (+/-41 K) and precision (+/-8 K) required for useful measurements in such systems. This represents the first application of TLAF thermometry to the investigation of low-pressure sooting flames, an environment in which other thermometry techniques perform poorly. We thus demonstrate a practical application of diode laser TLAF to a burner that is the subject of a coordinated experimental and computational investigation of soot formation. The TLAF technique requires no calibration measurement and is compact and economical to set up in comparison with traditional laser thermometry methods. Temperature profiles were recorded in a laminar flat-flame operating on O-2, N-2 and CH4 at fuel equivalence ratio of 2.32 and pressures ranging from 18.7 to 26.7 kPa. Almost identical temperature profiles were observed at different pressures despite the fact that soot volume fractions changed by more than an order of magnitude between the lowest and highest operating pressures. The data will contribute to modelling efforts to understand the surprisingly strong dependence of soot volume fraction on pressure that has previously been observed under the range of conditions studied here and will be included in an openly available database on this flame, which includes species profile measurements obtained by other methods. In the current contribution we emphasise the technical implementation of diode TLAF as a new temperature diagnostic with near optimal characteristics for the study of low pressure, sooting flames. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

KW - soot

KW - temperature

KW - diode laser

KW - low-pressure flame

KW - laser-induced fluorescence

KW - LIF thermometry

KW - spectroscopy

KW - spectrometry

KW - diagnostics

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DO - 10.1016/j.proci.2010.05.062

M3 - Article

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SP - 799

EP - 806

JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

SN - 1540-7489

IS - 1

ER -