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Viscous Effects and Truncation Effects in Axisymmetric Busemann SCRamjet Intakes

Flock, Andreas K und Gülhan, Ali (2015) Viscous Effects and Truncation Effects in Axisymmetric Busemann SCRamjet Intakes. In: 53rd AIAA Aerospace Sciences Meeting, 2015, Seiten 1-15. 53rd Aerospace Sciences Meeting, 2015-01-05 - 2015-01-09, Kissimmee, Florida, USA. doi: 10.2514/6.2015-0108.

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Kurzfassung

While designing a Busemann intake, we encountered two main constraints: First, caused by the displacement of the boundary layer, the pressure levels in a Busemann intake were higher (40%) than the values predicted analytically; these effects were labeled viscous effects. Second, truncating the flow field also changed the properties of the classical Busemann flow; these effects were labeled truncation effects and we distinguished between truncating the intake at the leading edge and at the rear side. To take into account viscous effects, we calculated the boundary layer displacement thickness with an integral method and widened the inviscid Busemann contour. To quantify the leading edge truncation effect, an oblique shock at the leading edge was assumed, and also the intake contraction ratio was stretched. The change in flow properties during the rear side truncation was derived in a stream thrust analysis. We separately investigated the effects with Reynoldsaveraged Navier-Stokes and Euler simulations, respectively. After the viscous correction, the deviation between numerically and analytically calculated pressure levels was below 10%. When truncating at the leading edge, the numerically calculated pressure level was generally too low, while the temperature level was within 5% of the prediction. After stretching the contraction ratio, we were able to keep the pressure within 5% of the design value, however in this case, the temperatures were generally too high. The stream thrust approach was highly accurate and for rear side truncated intakes we were able to predict the numerical pressure and temperature levels within 1% of the design values.

elib-URL des Eintrags:https://elib.dlr.de/97939/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Viscous Effects and Truncation Effects in Axisymmetric Busemann SCRamjet Intakes
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Flock, Andreas Kandreas.flock (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Gülhan, AliAli.Guelhan (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Januar 2015
Erschienen in:53rd AIAA Aerospace Sciences Meeting, 2015
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.2514/6.2015-0108
Seitenbereich:Seiten 1-15
Status:veröffentlicht
Stichwörter:SCRamjet, Busemann Intake, Hypersonics, Airbreathing Propulsion
Veranstaltungstitel:53rd Aerospace Sciences Meeting
Veranstaltungsort:Kissimmee, Florida, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:5 Januar 2015
Veranstaltungsende:9 Januar 2015
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):R - keine Zuordnung
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Über- und Hyperschalltechnologien
Hinterlegt von: Flock, Andreas
Hinterlegt am:31 Aug 2015 10:26
Letzte Änderung:24 Apr 2024 20:03

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