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About the Heat Flux and Skin Friction Prediction of the DLR TAU-code for Turbulent Supersonic Flows

Kovar, Anke und Schülein, Erich und Hannemann, Volker und Karl, Sebastian (2007) About the Heat Flux and Skin Friction Prediction of the DLR TAU-code for Turbulent Supersonic Flows. ODAS 2007 8th ONERA-DLR Aerospace Symposium, 2007-10-17 - 2007-10-19, Göttingen, Germany. (nicht veröffentlicht)

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Kurzfassung

Surface temperatures of missile configuration at supersonic speeds can easily reach values of 2,000 K depending on Mach number and altitude. Hence, the correct prediction of heat loads is crucial for the choice of materials within the design process of a missile configuration. For many Navier-Stokes-flow solvers it is still a challenging task to correctly predict heat flux and skin friction in turbulent supersonic boundary layers. In the hypersonic regime the flow is laminar in many cases, simplifying the equations and the calculation. In the supersonic speed range the flow along the body is nearly always transitional. The applied turbulence model can have a large influence on the predicted heat load distribution especially in the vicinity of reattachment and divergence zones of the flow. The more complex the flow gets, e.g. due to side-jet-injection, high angles of attack, and the associated flow separation, the more difficult it becomes to predict the heat flux correctly. This is the motivation to assess the heat flux obtained by the TAU-code (Gerhold and Evans, 1999 and Schwamborn et al, 1999), which is an internal development of the German Aerospace Centre (DLR), using an appropriate bench mark experiment which was carried out at DLR. The experiment (Schülein et al, 1996) was performed already a few years ago in the DLR Ludwieg Tube (RWG) at M=5.0 on a flat plate with a transitional boundary layer. It was set up as a 2-dimensional test case in which a shock generator was employed in a way that a shock impinged on the flat plate under different angles. The experiment provides for comparison data including boundary layer velocity profiles, heat flux, skin friction, and surface pressure in the region influenced by the shock and also along the turbulent region upstream of the interaction. First steps of the investigation cover the influence of grid cell resolution as well as the cell stretching within the boundary layer, and the influence of different turbulence models.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:About the Heat Flux and Skin Friction Prediction of the DLR TAU-code for Turbulent Supersonic Flows
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Kovar, AnkeNICHT SPEZIFIZIERT
Schülein, ErichNICHT SPEZIFIZIERT
Hannemann, VolkerNICHT SPEZIFIZIERT
Karl, SebastianNICHT SPEZIFIZIERT
Datum:15 März 2007
Status:nicht veröffentlicht
Stichwörter:Assessment of heat flux, skin friction, DLR-TAU-code, supersonic flows
Veranstaltungstitel:ODAS 2007 8th ONERA-DLR Aerospace Symposium
Veranstaltungsort:Göttingen, Germany
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-10-17 - 2007-10-19
Veranstalter :DLR Göttingen
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Militärische Technologien
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Raumfahrzeuge
Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen
Hinterlegt von: Dr.rer.nat. Anke Kovar
Hinterlegt am:25 Jun 2007
Letzte Änderung:12 Dez 2013 20:24

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