Improvement of rotational CARS thermometry in fuel-rich hydrocarbon flames by inclusion of N-2-H-2 Raman line widths
Bohlin, Alexis LU ; Vestin, Fredrik LU ; Joubert, Pierre ; Bonamy, Jeanine and Bengtsson, Per-Erik LU
(2009)
7th European Conference on Nonlinear Optical Spectroscopy (ECNOS)/1st European Conference on CARS Microscopy
40(7).
p.788-794
- Abstract
- In rotational coherent anti-Stokes Raman spectroscopy (CARS) thermometry applied to air-fed flames, the temperature sensitivity mainly depends on the intensity distribution of the nitrogen spectral lines. Temperatures are estimated by numerical fitting of theoretical spectra to experimental ones, and one uncertainty in the calculation of theoretical CARS spectra for specific flame conditions is the accuracy in utilized line-broadening coefficients. In a previous article, self-broadened N-2-N-2 line widths were considered in the spectral calculations as well as those of N-2-CO, N-2-CO2, N-2-H2O, and N-2-O-2- In the present article, we also include N-2-H-2 line widths calculated from a newly developed model, and it is shown that the... (More)
- In rotational coherent anti-Stokes Raman spectroscopy (CARS) thermometry applied to air-fed flames, the temperature sensitivity mainly depends on the intensity distribution of the nitrogen spectral lines. Temperatures are estimated by numerical fitting of theoretical spectra to experimental ones, and one uncertainty in the calculation of theoretical CARS spectra for specific flame conditions is the accuracy in utilized line-broadening coefficients. In a previous article, self-broadened N-2-N-2 line widths were considered in the spectral calculations as well as those of N-2-CO, N-2-CO2, N-2-H2O, and N-2-O-2- In the present article, we also include N-2-H-2 line widths calculated from a newly developed model, and it is shown that the evaluated temperature from flame spectra increases with increasing mole fractions of hydrogen. For example, in a very rich flame at Phi = 2.5, the use of available line-width data for all major species gives a temperature raise of 72 K at a temperature of similar to 1700 K, in comparison with using self-broadened N-2-N-2 line widths only. Half of this temperature raise is related to the inclusion of N-2-H-2 line widths. This article emphasizes the importance of using adequate line-broadening models for rotational CARS thermometry in flames. Copyright (C) 2009 John Wiley & Sons, Ltd. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1478217
- author
- Bohlin, Alexis
LU
; Vestin, Fredrik
LU
; Joubert, Pierre
; Bonamy, Jeanine
and Bengtsson, Per-Erik
LU
- organization
- publishing date
- 2009
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- CARS thermometry, rotational coherent anti-Stokes Raman spectroscopy, sooting premixed ethylene/air flames, N-2-H-2 line widths
- host publication
- Journal Of Raman Spectroscopy
- volume
- 40
- issue
- 7
- pages
- 788 - 794
- publisher
- John Wiley & Sons Inc.
- conference name
- 7th European Conference on Nonlinear Optical Spectroscopy (ECNOS)/1st European Conference on CARS Microscopy
- conference location
- Igls, Austria
- conference dates
- 2008-05-25 - 2008-05-27
- external identifiers
-
- wos:000268738600013
- scopus:69349094556
- ISSN
- 0377-0486
- DOI
- 10.1002/jrs.2235
- language
- English
- LU publication?
- yes
- id
- a5436e5f-78c0-4cda-a0e4-75489f3ec92b (old id 1478217)
- date added to LUP
- 2016-04-01 14:09:23
- date last changed
- 2022-03-21 22:28:05
@inproceedings{a5436e5f-78c0-4cda-a0e4-75489f3ec92b,
abstract = {{In rotational coherent anti-Stokes Raman spectroscopy (CARS) thermometry applied to air-fed flames, the temperature sensitivity mainly depends on the intensity distribution of the nitrogen spectral lines. Temperatures are estimated by numerical fitting of theoretical spectra to experimental ones, and one uncertainty in the calculation of theoretical CARS spectra for specific flame conditions is the accuracy in utilized line-broadening coefficients. In a previous article, self-broadened N-2-N-2 line widths were considered in the spectral calculations as well as those of N-2-CO, N-2-CO2, N-2-H2O, and N-2-O-2- In the present article, we also include N-2-H-2 line widths calculated from a newly developed model, and it is shown that the evaluated temperature from flame spectra increases with increasing mole fractions of hydrogen. For example, in a very rich flame at Phi = 2.5, the use of available line-width data for all major species gives a temperature raise of 72 K at a temperature of similar to 1700 K, in comparison with using self-broadened N-2-N-2 line widths only. Half of this temperature raise is related to the inclusion of N-2-H-2 line widths. This article emphasizes the importance of using adequate line-broadening models for rotational CARS thermometry in flames. Copyright (C) 2009 John Wiley & Sons, Ltd.}},
author = {{Bohlin, Alexis and Vestin, Fredrik and Joubert, Pierre and Bonamy, Jeanine and Bengtsson, Per-Erik}},
booktitle = {{Journal Of Raman Spectroscopy}},
issn = {{0377-0486}},
keywords = {{CARS thermometry; rotational coherent anti-Stokes Raman spectroscopy; sooting premixed ethylene/air flames; N-2-H-2 line widths}},
language = {{eng}},
number = {{7}},
pages = {{788--794}},
publisher = {{John Wiley & Sons Inc.}},
title = {{Improvement of rotational CARS thermometry in fuel-rich hydrocarbon flames by inclusion of N-2-H-2 Raman line widths}},
url = {{http://dx.doi.org/10.1002/jrs.2235}},
doi = {{10.1002/jrs.2235}},
volume = {{40}},
year = {{2009}},
}