Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy
Recently we demonstrated the simultaneous detection of the chemiluminescence of the radicals OH* (310 nm) and CH* (430 nm), as well as the thermal radiation of soot in laminar and turbulent methane/air diffusion flames. As expected, a strong spatial and temporal coupling of OH* and CH* in laminar an...
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doaj-140311214a7e43e5832590f783992b432020-11-25T02:11:39ZengMDPI AGEnergies1996-10732020-05-01132368236810.3390/en13092368Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction AccuracyThomas Häber0Rainer Suntz1Henning Bockhorn2Institute of Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyInstitute of Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyEngler-Bunte-Institute, Chair of Combustion Technology, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, GermanyRecently we demonstrated the simultaneous detection of the chemiluminescence of the radicals OH* (310 nm) and CH* (430 nm), as well as the thermal radiation of soot in laminar and turbulent methane/air diffusion flames. As expected, a strong spatial and temporal coupling of OH* and CH* in laminar and moderate turbulent flames was observed. Taking advantage of this coupling, multispecies tomography enables us to quantify the reconstruction quality completely independent of any phantom studies by simply utilizing the reconstructed distribution of both species. This is especially important in turbulent flames, where it is difficult to separate measurement noise from turbulent fluctuations. It is shown that reconstruction methods based on Tikhonov regularization should be preferred over the widely used algebraic reconstruction technique (ART) and multiplicative algebraic reconstruction techniques (MART), especially for high-speed imaging or generally in the limit of low signal-to-noise ratio.https://www.mdpi.com/1996-1073/13/9/2368optical emission tomographychemiluminescenecombustionTikhonov regularizationalgebraic reconstruction techniquelaminar and turbulent flows |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Thomas Häber Rainer Suntz Henning Bockhorn |
spellingShingle |
Thomas Häber Rainer Suntz Henning Bockhorn Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy Energies optical emission tomography chemiluminescene combustion Tikhonov regularization algebraic reconstruction technique laminar and turbulent flows |
author_facet |
Thomas Häber Rainer Suntz Henning Bockhorn |
author_sort |
Thomas Häber |
title |
Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy |
title_short |
Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy |
title_full |
Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy |
title_fullStr |
Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy |
title_full_unstemmed |
Two-Dimensional Tomographic Simultaneous Multispecies Visualization—Part II: Reconstruction Accuracy |
title_sort |
two-dimensional tomographic simultaneous multispecies visualization—part ii: reconstruction accuracy |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-05-01 |
description |
Recently we demonstrated the simultaneous detection of the chemiluminescence of the radicals OH* (310 nm) and CH* (430 nm), as well as the thermal radiation of soot in laminar and turbulent methane/air diffusion flames. As expected, a strong spatial and temporal coupling of OH* and CH* in laminar and moderate turbulent flames was observed. Taking advantage of this coupling, multispecies tomography enables us to quantify the reconstruction quality completely independent of any phantom studies by simply utilizing the reconstructed distribution of both species. This is especially important in turbulent flames, where it is difficult to separate measurement noise from turbulent fluctuations. It is shown that reconstruction methods based on Tikhonov regularization should be preferred over the widely used algebraic reconstruction technique (ART) and multiplicative algebraic reconstruction techniques (MART), especially for high-speed imaging or generally in the limit of low signal-to-noise ratio. |
topic |
optical emission tomography chemiluminescene combustion Tikhonov regularization algebraic reconstruction technique laminar and turbulent flows |
url |
https://www.mdpi.com/1996-1073/13/9/2368 |
work_keys_str_mv |
AT thomashaber twodimensionaltomographicsimultaneousmultispeciesvisualizationpartiireconstructionaccuracy AT rainersuntz twodimensionaltomographicsimultaneousmultispeciesvisualizationpartiireconstructionaccuracy AT henningbockhorn twodimensionaltomographicsimultaneousmultispeciesvisualizationpartiireconstructionaccuracy |
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