Accorinti, Alessandro und Baur, Tim und Scharnowski, Sven und Knebusch, Johannes und Dillinger, Johannes und Govers, Yves und Nitzsche, Jens und Kähler, C. (2020) Measurements of deformation, schlieren and forces on an OAT15A airfoil at buffet conditions. In: 10th EASN International Conference on Innovation in Aviation and Space to the Satisfaction of the European Citizens, EASN 2020. 10th EASN Virtual International Conference, 2020-09-02 - 2020-09-04, Online. doi: 10.1088/1757-899X/1024/1/012052. ISSN 1757-8981.
Dieses Archiv kann nicht den Volltext zur Verfügung stellen.
Kurzfassung
Self-sustained shock wave oscillations on airfoils, commonly defined as shock buffet, can occur under certain combinations of transonic Mach number and angle of attack due to the interaction between the shock and the separated boundary layer. To help understanding buffet physics, a rigid supercritical wing model (OAT15A) was investigated in pre-buffet and buffet conditions using a combined application of BOS (Background Oriented Schlieren), deformation and force measurements. From the observation via BOS of the change of the shock location and the extent of the boundary layer separation with the AoA (angle of attack), the transition from stable shock to buffet was detected. A comparison with other research groups at supposedly similar aerodynamic conditions highlighted a great disparity among them in terms of buffet onset, amplitudes of buffet oscillations, and flow development (motion of the mean shock location with the AoA) after the onset. The average and rms (root mean square) of the surface displacement were computed together with the effective geometric AoA, taking into account the static torsional deformation of the model and its support. Moreover, the spectra of the balance and deformation data showed the same buffet peak as in the BOS spectrum, indicating a coupling between structure and flow, which increased with the AoA.
elib-URL des Eintrags: | https://elib.dlr.de/139915/ | ||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||||||||||
Titel: | Measurements of deformation, schlieren and forces on an OAT15A airfoil at buffet conditions | ||||||||||||||||||||||||||||||||||||
Autoren: |
| ||||||||||||||||||||||||||||||||||||
Datum: | 2020 | ||||||||||||||||||||||||||||||||||||
Erschienen in: | 10th EASN International Conference on Innovation in Aviation and Space to the Satisfaction of the European Citizens, EASN 2020 | ||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1088/1757-899X/1024/1/012052 | ||||||||||||||||||||||||||||||||||||
ISSN: | 1757-8981 | ||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||
Stichwörter: | flutter, buffeting, unsteady aerodynamics, shock buffet, fluid structure interaction, transonic flow | ||||||||||||||||||||||||||||||||||||
Veranstaltungstitel: | 10th EASN Virtual International Conference | ||||||||||||||||||||||||||||||||||||
Veranstaltungsort: | Online | ||||||||||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 2 September 2020 | ||||||||||||||||||||||||||||||||||||
Veranstaltungsende: | 4 September 2020 | ||||||||||||||||||||||||||||||||||||
Veranstalter : | FCH JU | ||||||||||||||||||||||||||||||||||||
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 Aeroelastik > Strukturdynamik und Systemidentifikation Institut für Aeroelastik > Aeroelastische Simulation Institut für Aeroelastik > Lastanalyse und Entwurf | ||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Knebusch, Johannes | ||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 23 Dez 2020 12:20 | ||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:40 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags