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Experimental Investigation of a Two-Dimensional and a Three-Dimensional Scramjet Inlet at Mach 7

Häberle, Jürgen und Gülhan, Ali (2008) Experimental Investigation of a Two-Dimensional and a Three-Dimensional Scramjet Inlet at Mach 7. Journal of Propulsion and Power, 24 (5), Seiten 1023-1034.

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Kurzfassung

The current experimental study at Mach 7 was carried out to investigate the viscous flow effects in a scramjet inlet with a fixed geometry operating at Mach 7.5-8. To reduce the risk of inlet unstart, an optional passive boundary-layer bleed was integrated at the throat and tested for different bleed dimensions. The passive bleed significantly reduces the lip-shock-induced separation bubble on the ramp. But the correct location of the bleed gap is important for the reduction of the separation bubble. To investigate the compression behavior, different backpressures were applied and the effects on the internal flow structure were analyzed by means of static pressure along the isolator and pitot pressure profiles at the exit of the isolator. Because the reference configuration has a very small internal contraction ratio to guarantee self-starting, the internal compression ratio was increased in three steps by means of additional sidewall compression along the internal flowpath. This includes internal contraction ratios above the starting limit. This measure led to a significant increase of the static pressure ratio at the end of the isolator. The complex flow structures are explained by means of detailed static and pitot pressure plots.

Dokumentart:Zeitschriftenbeitrag
Titel:Experimental Investigation of a Two-Dimensional and a Three-Dimensional Scramjet Inlet at Mach 7
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Häberle, JürgenEADS München
Gülhan, AliNICHT SPEZIFIZIERT
Datum:September 2008
Erschienen in:Journal of Propulsion and Power
Referierte Publikation:Ja
In ISI Web of Science:Ja
Band:24
Seitenbereich:Seiten 1023-1034
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
AIAA, NICHT SPEZIFIZIERT
Status:veröffentlicht
Stichwörter:Scram-jet, inlet, aerothermal phenomena, hypersonic windtunnel H2K
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 - Grundlagen Raumtransport - Anlagen und Messtechnik (alt)
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik
Hinterlegt von: Christine Adams
Hinterlegt am:06 Okt 2008
Letzte Änderung:27 Apr 2009 15:15

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