Letzgus, Johannes und Gardner, Anthony D. und Schwermer, Till und Keßler, Manuel und Krämer, Ewald (2019) Numerical Investigations of Dynamic Stall on a Rotor with Cyclic Pitch Control. Journal of the American Helicopter Society, 64 (012007), Seiten 1-14. American Helicopter Society. doi: 10.4050/JAHS.64.012007. ISSN 0002-8711.
Dieses Archiv kann nicht den Volltext zur Verfügung stellen.
Kurzfassung
Numerical computations of three-dimensional dynamic stall on a two-bladed model rotor (R = 0.65 m, M_75 = 0.21, Re_75 = 3.5 × 10*5) with 1/rev cyclic pitch control are presented and compared to experimental surface pressure and particle image velocimetry data. In addition to unsteady Reynolds-averaged Navier-Stokes (URANS) simulations using the finite-volume flow solvers FLOWer and TAU, a delayed detached-eddy simulation (DDES) with Menter shear-stress transport (SST) as underlying Reynolds-averaged Navier-Stokes (RANS) model is carried out with FLOWer. Facing dynamic stall and flow separation, the DDES reproduces high-frequency load fluctuations, cycle-to-cycle variations, and small-scale vortical structures observed in the experiment, unlike the URANS results. However, common hybrid RANS/large-eddy simulation issues - grid-induced separation (GIS) and the gray area problem - play a role in this DDES and influence loads severely. FLOWer SST simulations yield load peaks of the same magnitude as individual, non-phase-averaged measurements. With TAU SST, the dynamic stall event is delayed and weakened compared to FLOWer SST and experimental results. FLOWer and TAU results using the Spalart-Allmaras turbulence model are fairly comparable but in bad agreement with the experiment at the outboard station at r/R = 0.77, where they exhibit no dynamic stall at all.
elib-URL des Eintrags: | https://elib.dlr.de/126072/ | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Numerical Investigations of Dynamic Stall on a Rotor with Cyclic Pitch Control | ||||||||||||||||||||||||
Autoren: |
| ||||||||||||||||||||||||
Datum: | 16 Januar 2019 | ||||||||||||||||||||||||
Erschienen in: | Journal of the American Helicopter Society | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
Band: | 64 | ||||||||||||||||||||||||
DOI: | 10.4050/JAHS.64.012007 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 1-14 | ||||||||||||||||||||||||
Herausgeber: |
| ||||||||||||||||||||||||
Verlag: | American Helicopter Society | ||||||||||||||||||||||||
ISSN: | 0002-8711 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | dynamic stall, rotor, RTG, DDES, URANS, TAU, FLOWER | ||||||||||||||||||||||||
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: | Göttingen | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO | ||||||||||||||||||||||||
Hinterlegt von: | Winkels, Elisabeth | ||||||||||||||||||||||||
Hinterlegt am: | 23 Jan 2019 14:33 | ||||||||||||||||||||||||
Letzte Änderung: | 24 Jan 2019 14:42 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags