Rotational CARS thermometry and concentration measurements in ethane-nitrogen mixtures using Fourier analysis
(2018) In Journal of Raman Spectroscopy 49(7). p.1096-1108- Abstract
Rotational coherent anti-Stokes Raman scattering (CARS) is an established diagnostic technique for thermometry and species concentration measurements of di-atomics and tri-atomics in combustion processes; however, studies on hydrocarbon fuel molecules have been scarce. In this work, we have investigated the diagnostic potential for rotational CARS on ethane with emphasis on concentration measurements in mixtures with nitrogen. Rotational CARS spectra have periodic line structures, and because ethane and nitrogen spectra partially overlap, a novel Fourier analysis approach was developed and applied to facilitate evaluation of relative concentrations and temperatures. Instead of the standard procedure of spectral fitting using libraries... (More)
Rotational coherent anti-Stokes Raman scattering (CARS) is an established diagnostic technique for thermometry and species concentration measurements of di-atomics and tri-atomics in combustion processes; however, studies on hydrocarbon fuel molecules have been scarce. In this work, we have investigated the diagnostic potential for rotational CARS on ethane with emphasis on concentration measurements in mixtures with nitrogen. Rotational CARS spectra have periodic line structures, and because ethane and nitrogen spectra partially overlap, a novel Fourier analysis approach was developed and applied to facilitate evaluation of relative concentrations and temperatures. Instead of the standard procedure of spectral fitting using libraries of theoretically calculated spectra, the fitting was based on an experimental database of temperatures and relative ethane/nitrogen concentrations. The method was successfully demonstrated in an ethane diffusion flame where ethane, initially at room temperature, is heated downstream as well as mixed with increasing amounts of nitrogen. The evaluated temperatures and concentrations are in good agreement with computational fluid dynamic model simulations.
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- author
- Hosseinnia, Ali LU ; Nordström, Emil LU ; Fatehi, Hesameddin LU ; Bood, Joakim LU and Bengtsson, Per Erik LU
- organization
- publishing date
- 2018-07
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Concentration measurements, Ethane, Fourier analysis, Rotational CARS, Thermometry
- in
- Journal of Raman Spectroscopy
- volume
- 49
- issue
- 7
- pages
- 1096 - 1108
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:85042117262
- ISSN
- 0377-0486
- DOI
- 10.1002/jrs.5339
- language
- English
- LU publication?
- yes
- id
- 45b40178-724b-4788-aa18-64a629aac8d7
- date added to LUP
- 2018-03-07 10:32:28
- date last changed
- 2022-03-17 06:11:24
@article{45b40178-724b-4788-aa18-64a629aac8d7, abstract = {{<p>Rotational coherent anti-Stokes Raman scattering (CARS) is an established diagnostic technique for thermometry and species concentration measurements of di-atomics and tri-atomics in combustion processes; however, studies on hydrocarbon fuel molecules have been scarce. In this work, we have investigated the diagnostic potential for rotational CARS on ethane with emphasis on concentration measurements in mixtures with nitrogen. Rotational CARS spectra have periodic line structures, and because ethane and nitrogen spectra partially overlap, a novel Fourier analysis approach was developed and applied to facilitate evaluation of relative concentrations and temperatures. Instead of the standard procedure of spectral fitting using libraries of theoretically calculated spectra, the fitting was based on an experimental database of temperatures and relative ethane/nitrogen concentrations. The method was successfully demonstrated in an ethane diffusion flame where ethane, initially at room temperature, is heated downstream as well as mixed with increasing amounts of nitrogen. The evaluated temperatures and concentrations are in good agreement with computational fluid dynamic model simulations.</p>}}, author = {{Hosseinnia, Ali and Nordström, Emil and Fatehi, Hesameddin and Bood, Joakim and Bengtsson, Per Erik}}, issn = {{0377-0486}}, keywords = {{Concentration measurements; Ethane; Fourier analysis; Rotational CARS; Thermometry}}, language = {{eng}}, number = {{7}}, pages = {{1096--1108}}, publisher = {{John Wiley & Sons Inc.}}, series = {{Journal of Raman Spectroscopy}}, title = {{Rotational CARS thermometry and concentration measurements in ethane-nitrogen mixtures using Fourier analysis}}, url = {{http://dx.doi.org/10.1002/jrs.5339}}, doi = {{10.1002/jrs.5339}}, volume = {{49}}, year = {{2018}}, }