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Influence of Heat Capacity Ratio on Pressure and Nozzle Flow of Scramjets

Hirschen, Christian Mark und Gülhan, Ali (2009) Influence of Heat Capacity Ratio on Pressure and Nozzle Flow of Scramjets. Journal of Propulsion and Power, 25 (2), Seiten 303-311. ISSN 0748-4658.

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Kurzfassung

An experimental study of flows over a single expansion ramp nozzle with side walls was carried out at the German Aerospace Center (DLR). The tests were performed at a free-stream Mach number of 7 in the hypersonic wind tunnel H2K of the wind tunnel department in Cologne. The Reynolds number, nozzle pressure ratio, and the heat capacity ratio were varied in order to study the performance of the scramjet nozzle at different flight altitudes and run conditions. The effects of different heat capacity ratios have been investigated by using gases with higher and lower heat capacity ratios than air. The static pressure distribution on the single expansion ramp was measured by using PSI (Pressure System Incorporated) pressure transducer taps location at discrete points on the surface. Schlieren photographs were taken by a high-speed camera in order to visualize the flow field and investigate the influence of the heat capacity ratio on the interactions between the external and the nozzle flow. The obtained experimental results are discussed and compared with the Schlieren photographs. An effect of the heat capacity ratio on the pressure distribution and the interactions between external and nozzle flow was found. The data obtained by the different measurement techniques permitted a characterization of the nozzle flow and gave an insight into the properties of single expansion ramp nozzle flows.

Dokumentart:Zeitschriftenbeitrag
Titel:Influence of Heat Capacity Ratio on Pressure and Nozzle Flow of Scramjets
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hirschen, Christian MarkNICHT SPEZIFIZIERT
Gülhan, AliAli.Guelhan@dlr.de
Datum:März 2009
Erschienen in:Journal of Propulsion and Power
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:25
Seitenbereich:Seiten 303-311
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
AIAA, NICHT SPEZIFIZIERT
ISSN:0748-4658
Status:veröffentlicht
Stichwörter:SERN, Nozzle flow, Heat capacity ratio, Scramjet
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):W - Antriebsystemtechnik - Antriebskonzepte (alt)
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik
Hinterlegt von: Christine Adams
Hinterlegt am:12 Jan 2009
Letzte Änderung:07 Feb 2013 20:34

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