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Gundlach, G. and Dankert, C. and Hefer, G. and Lehmköster, K. (1993) LIF Measurement of Rotational Temperatures Near a Hot Surface. Part I: Cu-Disk in a Hypersonic Free Jet. DLR-Interner Bericht. 222 - 93 A 27. 25 S.
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Abstract
A method for the measurement of temperatures and densities in rarefied flow is the Laser Induced Fluorescence (LIF) spectroscopy which is applied to reentry simulation of Hermes, Saenger, and the Shuttle in wind tunnels. The strong nonequilibrium of rotational and vibrational temperature is typical of hypersonic wind tunnels becauseof the rapid expansion in Laval nozzle or free jets. LIF excitation spectra of nitric oxide (NO) were measured in a hot hypersonic free jet expansion in the vacuum wind tunnel at DLR Goettingen in a wide density range (10 up 11 - 10 up 16 molecules/cm3). To interpret the experimental results, a computer program was developed that calculates excitation spectra. By means of LIF measurements in the free flow and in front of a model surface details of the heat transfer can be examined. This is relevant for the gas-surface interaction of reentry vehicles.
| Item URL in elib: | https://elib.dlr.de/37009/ | |||||||||||||||
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| Document Type: | Monograph (DLR-Interner Bericht) | |||||||||||||||
| Additional Information: | LIDO-Berichtsjahr=1993, | |||||||||||||||
| Title: | LIF Measurement of Rotational Temperatures Near a Hot Surface. Part I: Cu-Disk in a Hypersonic Free Jet | |||||||||||||||
| Authors: |
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| Date: | 1993 | |||||||||||||||
| Journal or Publication Title: | Auftragsbericht, Auftraggeber: DASSAULT Aviation, Velizy/France Auftragsnr. HERMES R/Q 2731101N, 08T 00052, DPH No.7373/92 - Rider 2 | |||||||||||||||
| Open Access: | No | |||||||||||||||
| Gold Open Access: | No | |||||||||||||||
| In SCOPUS: | No | |||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||
| Number of Pages: | 25 | |||||||||||||||
| Status: | Published | |||||||||||||||
| Keywords: | Laser induced fluorescence, Gas-surface interaction, Non-equilibrium flows, Free jet expansion, Hypersonic flow, Temperature measurement | |||||||||||||||
| HGF - Research field: | UNSPECIFIED | |||||||||||||||
| HGF - Program: | Space (old) | |||||||||||||||
| HGF - Program Themes: | W RP - Raumtransport | |||||||||||||||
| DLR - Research area: | UNSPECIFIED | |||||||||||||||
| DLR - Program: | W RP - Raumtransport | |||||||||||||||
| DLR - Research theme (Project): | UNSPECIFIED | |||||||||||||||
| Location: | Köln-Porz , Braunschweig , Göttingen | |||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik | |||||||||||||||
| Deposited By: | DLR-Beauftragter, elib | |||||||||||||||
| Deposited On: | 03 Apr 2006 | |||||||||||||||
| Last Modified: | 27 Apr 2009 10:07 |
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