Risius, Steffen und Costantini, Marco und Hein, Stefan und Koch, Stefan und Klein, Christian (2018) Experimental investigation of Mach number and pressure gradient effects on boundary layer transition in two-dimensional flow. In: NOTES ON NUMERICAL FLUID MECHANICS (136), Seiten 305-314. Springer International Publishing AG. doi: 10.1007/978-3-319-64519-3_28. ISBN 978-3-319-64518-6. ISSN 1612-2909.
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Offizielle URL: https://link.springer.com/chapter/10.1007/978-3-319-64519-3_28
Kurzfassung
The influence of Mach number (M = 0.35 to 0.65), chord Reynolds number (Rec = 6E6 to 10E6) and pressure gradient (dcp/dx= -0.6 to 0.07 1/m) on laminar-turbulent boundary layer transition was experimentally investigated in the Cryogenic Ludwieg-Tube Göttingen (DNW-KRG). For this investigation the existing two-dimensional wind tunnel model, PaLASTra, which offers a quasi-uniform streamwise pressure gradient, was modified in order to reduce the size of the flow separation at its trailing edge. The streamwise temperature distribution and the location of laminar-turbulent transition were measured by means of temperature-sensitive paint (TSP). It was found that the transition Reynolds number exhibits a linear dependence on the pressure gradient, characterized by the Hartree parameter, and that an increasing Mach number leads to a linear decrease of the transition Reynolds number. This effect is likely due to an increase of the total pressure turbulence level with Mach number in DNW-KRG. The measured pressure and temperature distributions served as input for boundary layer calculations and linear-stability analysis. N-factors were calculated according to compressible and incompressible stability theory. At zero pressure gradient a critical N-factor of approximately 9.5 and 9.0 was found for incompressible and compressible calculations, respectively.
elib-URL des Eintrags: | https://elib.dlr.de/117952/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||||||
Zusätzliche Informationen: | E-ISSN: 1860-0824; Online ISBN: 978-3-319-64519-3; https://doi.org/10.1007/978-3-319-64519-3_28; Buchuntertitel: Contributions to the 20th STAB/DGLR Symposium Braunschweig, Germany, 2016 | ||||||||||||||||||||||||||||||||
Titel: | Experimental investigation of Mach number and pressure gradient effects on boundary layer transition in two-dimensional flow | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2018 | ||||||||||||||||||||||||||||||||
Erschienen in: | NOTES ON NUMERICAL FLUID MECHANICS | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
DOI: | 10.1007/978-3-319-64519-3_28 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 305-314 | ||||||||||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Springer International Publishing AG | ||||||||||||||||||||||||||||||||
Name der Reihe: | New Results in Numerical and Experimental Fluid Mechanics XI | ||||||||||||||||||||||||||||||||
ISSN: | 1612-2909 | ||||||||||||||||||||||||||||||||
ISBN: | 978-3-319-64518-6 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | boundary layer transition, COCO, compressibility effect, critical N-factor, Cryogenic Ludwieg-Tube Göttingen (DNW-KRG), freestream pressure fluctuations, laminar-turbulent transition, LILO, linear stability analysis, Mach number effect, PaLASTra, temperature-sensitive paint (TSP), Tollmien-Schlichting waves, transonic wind tunnel | ||||||||||||||||||||||||||||||||
Veranstaltungsart: | Andere | ||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 8 November 2016 | ||||||||||||||||||||||||||||||||
Veranstaltungsende: | 9 November 2016 | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Flugzeuge | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L AR - Aircraft Research | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Simulation und Validierung (alt) | ||||||||||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren, GO Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen, GO | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Bachmann, Barbara | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 11 Jan 2018 08:47 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 04 Jun 2024 13:33 |
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