Costantini, Marco (2015) Effect of forward-facing steps on boundary-layer transition in combination with stability modifiers. AIA Seminar, 28. Mai 2015, Aachen, Deutschland.
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Kurzfassung
Experiments were conducted up to high subsonic Mach number in the Cryogenic Ludwieg-Tube Göttingen to study the influence of surface imperfections on boundary layer transition. Forward-facing steps of different height were installed on two spanwise-invariant wind tunnel models and their effect on transition was examined at high chord Reynolds numbers, various streamwise pressure gradients, and different wall temperature ratios. Transition, detected non-intrusively by means of the Temperature-Sensitive Paint technique, was found to gradually move towards the step location with increasing step Reynolds numbers and relative step height. Larger flow acceleration and reduced wall temperature ratios had a favorable influence on the transition Reynolds number even in the presence of forward-facing steps, but their effect was less pronounced as the step Reynolds number was increased. The plots of the relative change in transition location as a function of the step Reynolds number gave good correlation of the results obtained at all examined Mach numbers and with both wind tunnel models.
elib-URL des Eintrags: | https://elib.dlr.de/96420/ | ||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||
Titel: | Effect of forward-facing steps on boundary-layer transition in combination with stability modifiers | ||||||||
Autoren: |
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Datum: | 2015 | ||||||||
Referierte Publikation: | Nein | ||||||||
Open Access: | Nein | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Nein | ||||||||
In ISI Web of Science: | Nein | ||||||||
Status: | veröffentlicht | ||||||||
Stichwörter: | Boundary layer transition; forward-facing steps; Temperature-Sensitive Paint | ||||||||
Veranstaltungstitel: | AIA Seminar | ||||||||
Veranstaltungsort: | Aachen, Deutschland | ||||||||
Veranstaltungsart: | Andere | ||||||||
Veranstaltungsdatum: | 28. Mai 2015 | ||||||||
Veranstalter : | RWTH Aachen | ||||||||
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 | ||||||||
Hinterlegt von: | Micknaus, Ilka | ||||||||
Hinterlegt am: | 16 Jun 2015 10:54 | ||||||||
Letzte Änderung: | 02 Mai 2023 15:33 |
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