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Stützer, Robert and Oschwald, Michael (2019) The Hyperfine Structure of the OH* Emission Spectrum and its Benefits for Combustion Analysis. In: Proceedings of the 8th European Conference for Aeronautics and Space Sciences. 8th European Conference for Aeronautics and Space Sciences EUCASS, 1. - 4. Jul. 2019, Madrid, Spain. doi: 10.13009/EUCASS2019-839.
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Abstract
The hyperfine structure of the OH radical emission spectrum was used to derive hydrogen flame temperatures in a research rocket combustor. A spectral resolution of less than 1nm was realized, revealing single molecular emission lines. Hence, relative intensities of several emission lines in the ultraviolet regime were investigated regarding temperature. Two groups of lines were used in order to correlate values of heat release with band intensities. Using an optically accessible diagnostic element, optical fiber, and a high-resolution spectrograph, measurements were conducted during LOX/gH2 combustion runs at the European research test bench P8. The feasibility of line-of-sight flame temperature measurements in the vicinity of the injector element was shown. Temperature values of (3200±200)K were determined. Experimentally obtained values are in good agreement with simulation data.
| Item URL in elib: | https://elib.dlr.de/130536/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | The Hyperfine Structure of the OH* Emission Spectrum and its Benefits for Combustion Analysis | |||||||||
| Authors: |
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| Date: | 2019 | |||||||||
| Journal or Publication Title: | Proceedings of the 8th European Conference for Aeronautics and Space Sciences | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| DOI: | 10.13009/EUCASS2019-839 | |||||||||
| Status: | Published | |||||||||
| Keywords: | Flame Emission, Flame Emission Spectroscopy, Combustion, OH* | |||||||||
| Event Title: | 8th European Conference for Aeronautics and Space Sciences EUCASS | |||||||||
| Event Location: | Madrid, Spain | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | 1. - 4. Jul. 2019 | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Space | |||||||||
| HGF - Program Themes: | Space Transportation | |||||||||
| DLR - Research area: | Raumfahrt | |||||||||
| DLR - Program: | R RP - Space Transportation | |||||||||
| DLR - Research theme (Project): | R - Antriebsystemtechnik - Schubkammertechnologie (old) | |||||||||
| Location: | Lampoldshausen | |||||||||
| Institutes and Institutions: | Institute of Space Propulsion | |||||||||
| Deposited By: | Hanke, Michaela | |||||||||
| Deposited On: | 18 Nov 2019 09:22 | |||||||||
| Last Modified: | 18 Nov 2019 09:22 |
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