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Determination of NO-Rotational and Vibrational Temperature Profiles in a High Enthalpy Flow Field with NONEQUILIBRIUM

Koch, U. und Gülhan, A. und Esser, B. (1999) Determination of NO-Rotational and Vibrational Temperature Profiles in a High Enthalpy Flow Field with NONEQUILIBRIUM. First Joint French-German Symposium of Simulation of Atmospheric Entries by Means of Ground Test Facilities, Stuttgart, 17.-18. November 1999.

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Kurzfassung

The Laser Induced Fluorescence technique (LIF) was used for the determination of vibrational and rotational temperatures and the concentrations of NO-molecules in free stream regions and near models in the arc-heated high enthalpy facilities (LBK) of DLR in Cologne. The main advantages of this non-intrusive spectroscopic technique are the high selectivity and its good sensitivity combined with excellent resolution and the possiblity to measure simultaneously spatially resolved temperatures and concentration profiles in planes or along lines. In the free stream regions the vibrational and rotational temperatures of NO are nearly identical, while in the shock layer the vibrational temperatures of NO are lower compared to its rotational temperatures. The measured values are compared with results from aerothermodynamic calculations and with results from N2-CARS-measurements, which have been performed in LBK using the same flow condition and model configuration. The different vibrational temperatures of NO and N2 in the free stream and in the shock layer are explained by the faster vibrational relaxation of NO compared to N2

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=2000,
Titel:Determination of NO-Rotational and Vibrational Temperature Profiles in a High Enthalpy Flow Field with NONEQUILIBRIUM
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Koch, U.NICHT SPEZIFIZIERT
Gülhan, A.NICHT SPEZIFIZIERT
Esser, B.NICHT SPEZIFIZIERT
Datum:1999
Seitenbereich:
Status:veröffentlicht
Stichwörter:high enthalpy gas, hypersonic flow, temperature measurement, laser induced fluorescence
Veranstaltungstitel:First Joint French-German Symposium of Simulation of Atmospheric Entries by Means of Ground Test Facilities, Stuttgart, 17.-18. November 1999
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W RP - Raumtransport
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W RP - Raumtransport
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Institut für Strömungsmechanik
Hinterlegt von: elib DLR-Beauftragter
Hinterlegt am:16 Sep 2005
Letzte Änderung:14 Jan 2010 20:47

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