Richter, Kai und Koch, Stefan und Goerttler, Andreas und Lütke, Benjamin und Wolf, Christian C. und Benkel, Andreas (2015) Unsteady Boundary Layer Transition on the DSA-9A Rotor Blade Airfoil. European Rotorcraft Forum 2015, 2015-09-01 - 2015-09-04, Munich, Germany.
Dieses Archiv kann nicht den Volltext zur Verfügung stellen.
Offizielle URL: http://www.erf2015.dglr.de/
Kurzfassung
The unsteady boundary layer transition on the pitching helicopter main rotor blade airfoil DSA-9A was experimentally investigated by the use of hot film anemometry and unsteady pressure measurements. The unsteady flow characteristics on the upper and the lower side of the airfoil were analyzed for steady test cases and dynamic cases with sinusoidal pitching motion in attached flow conditions at M = 0:30 and Re = 1:8 x 10^6. The paper discusses the unsteady transition characteristics in detail and presents the influence of the pitching frequency on the unsteady transition. The results indicate that a large transition hysteresis exists on both sides of the airfoil, and that the hysteresis is much larger than can be explained by the unsteadiness in lift. Significant transition zones exist on the airfoil with sizes of up to 55% chord. The frequency influence is seen in an increase in the hysteresis and in a reduction of the size of the transition zone with increasing frequency.
elib-URL des Eintrags: | https://elib.dlr.de/95325/ | ||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||
Zusätzliche Informationen: | ERF2015_0099 | ||||||||||||||||||||||||||||
Titel: | Unsteady Boundary Layer Transition on the DSA-9A Rotor Blade Airfoil | ||||||||||||||||||||||||||||
Autoren: |
| ||||||||||||||||||||||||||||
Datum: | 2015 | ||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-17 | ||||||||||||||||||||||||||||
Name der Reihe: | Conference Proceedings online | ||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||
Stichwörter: | rotor blade airfoil DSA-9A, unsteady transition, hot film anemometry, DNW-TWG | ||||||||||||||||||||||||||||
Veranstaltungstitel: | European Rotorcraft Forum 2015 | ||||||||||||||||||||||||||||
Veranstaltungsort: | Munich, Germany | ||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 1 September 2015 | ||||||||||||||||||||||||||||
Veranstaltungsende: | 4 September 2015 | ||||||||||||||||||||||||||||
Veranstalter : | DGLR | ||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||
HGF - Programmthema: | Hubschrauber | ||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L RR - Rotorcraft Research | ||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Der virtuelle Drehflügler (alt) | ||||||||||||||||||||||||||||
Standort: | Braunschweig , Göttingen | ||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hubschrauber Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen Institut für Aeroelastik > Aeroelastische Experimente Deutsch-Niederländische Windkanäle > Business Unit Göttingen und Köln (GUK) Institut für Flugsystemtechnik > Hubschrauber | ||||||||||||||||||||||||||||
Hinterlegt von: | Micknaus, Ilka | ||||||||||||||||||||||||||||
Hinterlegt am: | 05 Okt 2015 14:48 | ||||||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:01 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags