On the sensitivity of rotational CARS N-2 thermometry to the Herman-Wallis factor
Bohlin, Alexis LU ; Bengtsson, Per-Erik LU
and Marrocco, Michele
(2011)
In Journal of Raman Spectroscopy
42(10).
p.1843-1847
- Abstract
- Purely rotational spectral signals of coherent anti-Stokes Raman scattering (CARS) from nitrogen molecules are studied as a function of the vibration-rotation interaction that weakens the rigid rotor approximation under which the dominant terms of the Raman cross section are calculated. The effect of the vibration-rotation interaction is quantified by means of the Herman-Wallis (HW) factor, and different approaches to its determination are evaluated in terms of their relative contribution to the CARS intensity and thermometric measurements made in a fuel-rich hydrocarbon flame. Known HW factors are contrasted with more complete expressions of recent derivation, and it is found that relative line strength adjustments amount to about a few... (More)
- Purely rotational spectral signals of coherent anti-Stokes Raman scattering (CARS) from nitrogen molecules are studied as a function of the vibration-rotation interaction that weakens the rigid rotor approximation under which the dominant terms of the Raman cross section are calculated. The effect of the vibration-rotation interaction is quantified by means of the Herman-Wallis (HW) factor, and different approaches to its determination are evaluated in terms of their relative contribution to the CARS intensity and thermometric measurements made in a fuel-rich hydrocarbon flame. Known HW factors are contrasted with more complete expressions of recent derivation, and it is found that relative line strength adjustments amount to about a few percent. Such differences result in temperature corrections of less than 1%. This value should be considered for the definition of the ideal thermometric accuracy of the technique but it is of minor importance in comparison with other sources of uncertainty (e. g. Raman line widths) that emerge from the complexity typical of reactive gas mixtures. Copyright (C) 2011 John Wiley & Sons, Ltd. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2252710
- author
- Bohlin, Alexis
LU
; Bengtsson, Per-Erik
LU
and Marrocco, Michele
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- coherent anti-Stokes Raman spectroscopy, laser spectroscopy, spectroscopic techniques, combustion diagnostics, thermometry
- in
- Journal of Raman Spectroscopy
- volume
- 42
- issue
- 10
- pages
- 1843 - 1847
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000297028600004
- scopus:79961049652
- ISSN
- 1097-4555
- DOI
- 10.1002/jrs.2869
- language
- English
- LU publication?
- yes
- id
- 7996f384-5966-422d-983c-51efb5ca653d (old id 2252710)
- date added to LUP
- 2016-04-01 13:18:42
- date last changed
- 2022-04-21 20:57:32
@article{7996f384-5966-422d-983c-51efb5ca653d,
abstract = {{Purely rotational spectral signals of coherent anti-Stokes Raman scattering (CARS) from nitrogen molecules are studied as a function of the vibration-rotation interaction that weakens the rigid rotor approximation under which the dominant terms of the Raman cross section are calculated. The effect of the vibration-rotation interaction is quantified by means of the Herman-Wallis (HW) factor, and different approaches to its determination are evaluated in terms of their relative contribution to the CARS intensity and thermometric measurements made in a fuel-rich hydrocarbon flame. Known HW factors are contrasted with more complete expressions of recent derivation, and it is found that relative line strength adjustments amount to about a few percent. Such differences result in temperature corrections of less than 1%. This value should be considered for the definition of the ideal thermometric accuracy of the technique but it is of minor importance in comparison with other sources of uncertainty (e. g. Raman line widths) that emerge from the complexity typical of reactive gas mixtures. Copyright (C) 2011 John Wiley & Sons, Ltd.}},
author = {{Bohlin, Alexis and Bengtsson, Per-Erik and Marrocco, Michele}},
issn = {{1097-4555}},
keywords = {{coherent anti-Stokes Raman spectroscopy; laser spectroscopy; spectroscopic techniques; combustion diagnostics; thermometry}},
language = {{eng}},
number = {{10}},
pages = {{1843--1847}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Journal of Raman Spectroscopy}},
title = {{On the sensitivity of rotational CARS N-2 thermometry to the Herman-Wallis factor}},
url = {{http://dx.doi.org/10.1002/jrs.2869}},
doi = {{10.1002/jrs.2869}},
volume = {{42}},
year = {{2011}},
}