Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner
Chemical species tomography enables non-invasive measurements of temperatures and concentrations in gas phase processes. In this work, we demonstrate the recently introduced linear hyperspectral absorption tomography (LHAT) on an axisymmetric counterflow burner used for speciation studies of Oxyfuel...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2019-07-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/12/14/2786 |
| _version_ | 1811299432176549888 |
|---|---|
| author | Johannes Emmert Martina Baroncelli Sani v.d. Kley Heinz Pitsch Steven Wagner |
| author_facet | Johannes Emmert Martina Baroncelli Sani v.d. Kley Heinz Pitsch Steven Wagner |
| author_sort | Johannes Emmert |
| collection | DOAJ |
| description | Chemical species tomography enables non-invasive measurements of temperatures and concentrations in gas phase processes. In this work, we demonstrate the recently introduced linear hyperspectral absorption tomography (LHAT) on an axisymmetric counterflow burner used for speciation studies of Oxyfuel combustion. As LHAT reconstructs spectrally resolved local absorption coefficient spectra, the physical plausibility of these reconstructed spectra degrades with an over-regularization of the tomographic problem. As presented in this work, this behavior can be employed in a novel regularization parameter choice method based on the residuals of local spectroscopic fits to the reconstructed spectra. After determining the regularization parameter, the reconstructions of the temperature and water mole fraction profiles of different flames are compared to numerical simulations, showing a good agreement. |
| first_indexed | 2024-04-13T06:35:50Z |
| format | Article |
| id | doaj.art-ae217e68f29b42d1bf150270ad448b5a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T06:35:50Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ae217e68f29b42d1bf150270ad448b5a2022-12-22T02:57:56ZengMDPI AGEnergies1996-10732019-07-011214278610.3390/en12142786en12142786Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow BurnerJohannes Emmert0Martina Baroncelli1Sani v.d. Kley2Heinz Pitsch3Steven Wagner4Department of Reactive Flows and Diagnostics, Technische Universität Darmstadt, 64287 Darmstadt, GermanyInstitute for Combustion Technology, RWTH Aachen University, 52056 Aachen, GermanyDepartment of Reactive Flows and Diagnostics, Technische Universität Darmstadt, 64287 Darmstadt, GermanyInstitute for Combustion Technology, RWTH Aachen University, 52056 Aachen, GermanyDepartment of Reactive Flows and Diagnostics, Technische Universität Darmstadt, 64287 Darmstadt, GermanyChemical species tomography enables non-invasive measurements of temperatures and concentrations in gas phase processes. In this work, we demonstrate the recently introduced linear hyperspectral absorption tomography (LHAT) on an axisymmetric counterflow burner used for speciation studies of Oxyfuel combustion. As LHAT reconstructs spectrally resolved local absorption coefficient spectra, the physical plausibility of these reconstructed spectra degrades with an over-regularization of the tomographic problem. As presented in this work, this behavior can be employed in a novel regularization parameter choice method based on the residuals of local spectroscopic fits to the reconstructed spectra. After determining the regularization parameter, the reconstructions of the temperature and water mole fraction profiles of different flames are compared to numerical simulations, showing a good agreement.https://www.mdpi.com/1996-1073/12/14/2786tomographyparameter selectionabsorption spectroscopytunable diode laserOxyfuel |
| spellingShingle | Johannes Emmert Martina Baroncelli Sani v.d. Kley Heinz Pitsch Steven Wagner Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner Energies tomography parameter selection absorption spectroscopy tunable diode laser Oxyfuel |
| title | Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner |
| title_full | Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner |
| title_fullStr | Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner |
| title_full_unstemmed | Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner |
| title_short | Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner |
| title_sort | axisymmetric linear hyperspectral absorption spectroscopy and residuum based parameter selection on a counter flow burner |
| topic | tomography parameter selection absorption spectroscopy tunable diode laser Oxyfuel |
| url | https://www.mdpi.com/1996-1073/12/14/2786 |
| work_keys_str_mv | AT johannesemmert axisymmetriclinearhyperspectralabsorptionspectroscopyandresiduumbasedparameterselectiononacounterflowburner AT martinabaroncelli axisymmetriclinearhyperspectralabsorptionspectroscopyandresiduumbasedparameterselectiononacounterflowburner AT sanivdkley axisymmetriclinearhyperspectralabsorptionspectroscopyandresiduumbasedparameterselectiononacounterflowburner AT heinzpitsch axisymmetriclinearhyperspectralabsorptionspectroscopyandresiduumbasedparameterselectiononacounterflowburner AT stevenwagner axisymmetriclinearhyperspectralabsorptionspectroscopyandresiduumbasedparameterselectiononacounterflowburner |