In situ determination of N-2 broadening coefficients in flames for rotational CARS thermometry
(2013) In Proceedings of the Combustion Institute 34. p.3637-3644- Abstract
- Total N-2 S-branch broadening coefficients have been measured in situ as a function of radial position in a highly sooting ethylene diffusion flame by the use of time-resolved dual-broadband picosecond pure rotational CARS (RCARS). Time-domain measurements of the J-dependent N-2 rotational coherence decays in the flame were used to determine the broadening coefficients, and these coefficients were then used in the spectral fitting routine for the determination of temperature and [O-2]/[N-2] ratio in the flame. Corrections of up to 125 K are found when compared to spectral fitting using an ECS self-broadened N-2 linewidth model. The presented technique effectively takes into account contributions to the N-2 linewidths from all collision... (More)
- Total N-2 S-branch broadening coefficients have been measured in situ as a function of radial position in a highly sooting ethylene diffusion flame by the use of time-resolved dual-broadband picosecond pure rotational CARS (RCARS). Time-domain measurements of the J-dependent N-2 rotational coherence decays in the flame were used to determine the broadening coefficients, and these coefficients were then used in the spectral fitting routine for the determination of temperature and [O-2]/[N-2] ratio in the flame. Corrections of up to 125 K are found when compared to spectral fitting using an ECS self-broadened N-2 linewidth model. The presented technique effectively takes into account contributions to the N-2 linewidths from all collision partners without any a priori knowledge of relative species concentrations. Published by Elsevier Inc. on behalf of The Combustion Institute. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3476876
- author
- Gao, Yi ; Bohlin, Alexis LU ; Seeger, Thomas ; Bengtsson, Per-Erik LU and Kliewer, Christopher J.
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Time-resolved spectroscopy, Raman linewidths, CARS, Ultrafast, Soot
- in
- Proceedings of the Combustion Institute
- volume
- 34
- pages
- 3637 - 3644
- publisher
- Elsevier
- external identifiers
-
- wos:000313131800198
- scopus:84872017274
- ISSN
- 1540-7489
- DOI
- 10.1016/j.proci.2012.05.010
- language
- English
- LU publication?
- yes
- id
- ed43e65a-f583-4f04-bc64-90d5a69b5069 (old id 3476876)
- date added to LUP
- 2016-04-01 10:11:24
- date last changed
- 2022-03-04 17:00:35
@article{ed43e65a-f583-4f04-bc64-90d5a69b5069, abstract = {{Total N-2 S-branch broadening coefficients have been measured in situ as a function of radial position in a highly sooting ethylene diffusion flame by the use of time-resolved dual-broadband picosecond pure rotational CARS (RCARS). Time-domain measurements of the J-dependent N-2 rotational coherence decays in the flame were used to determine the broadening coefficients, and these coefficients were then used in the spectral fitting routine for the determination of temperature and [O-2]/[N-2] ratio in the flame. Corrections of up to 125 K are found when compared to spectral fitting using an ECS self-broadened N-2 linewidth model. The presented technique effectively takes into account contributions to the N-2 linewidths from all collision partners without any a priori knowledge of relative species concentrations. Published by Elsevier Inc. on behalf of The Combustion Institute.}}, author = {{Gao, Yi and Bohlin, Alexis and Seeger, Thomas and Bengtsson, Per-Erik and Kliewer, Christopher J.}}, issn = {{1540-7489}}, keywords = {{Time-resolved spectroscopy; Raman linewidths; CARS; Ultrafast; Soot}}, language = {{eng}}, pages = {{3637--3644}}, publisher = {{Elsevier}}, series = {{Proceedings of the Combustion Institute}}, title = {{In situ determination of N-2 broadening coefficients in flames for rotational CARS thermometry}}, url = {{http://dx.doi.org/10.1016/j.proci.2012.05.010}}, doi = {{10.1016/j.proci.2012.05.010}}, volume = {{34}}, year = {{2013}}, }