Gardner, Anthony und Opitz, Steffen und Wolf, Christian und Merz, Christoph B. (2017) Reduction of dynamic stall using a back-flow flap. CEAS Aeronautical Journal, 8, Seiten 271-286. Springer. doi: 10.1007/s13272-017-0237-4. ISSN 1869-5590.
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Offizielle URL: http://link.springer.com/article/10.1007/s13272-017-0237-4
Kurzfassung
A back-flow flap attached to the suction side of an airfoil is investigated in both passively and actively actuated modes for the control of dynamic stall. This method of dynamic stall control has low power requirements and no parasitic drag when not actuated. Experiments in a low-speed wind tunnel at 50 m/s were used to characterize the reduction in dynamic· stall hysteresis using pressure measurements on the midline airfoil section. lt was found that the pitching moment peak is reduced by an average of 25% for all deep stall test cases for active actuation of the flap, while for passive actuation the pitching moment peak is reduced by 19%. In each case the maximum litt remained the same, while the peak drag increased by an average of 2.5% for the active flap, and by 0.9% for the passive flap. With the flap closed at low angles of attack, the reference values of the airfoil are retained.
elib-URL des Eintrags: | https://elib.dlr.de/111827/ | ||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||
Zusätzliche Informationen: | Published online: 17 February 2017; 1869-5582 (print); 1869-5590 (Online) | ||||||||||||||||||||
Titel: | Reduction of dynamic stall using a back-flow flap | ||||||||||||||||||||
Autoren: |
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Datum: | 17 Februar 2017 | ||||||||||||||||||||
Erschienen in: | CEAS Aeronautical Journal | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Band: | 8 | ||||||||||||||||||||
DOI: | 10.1007/s13272-017-0237-4 | ||||||||||||||||||||
Seitenbereich: | Seiten 271-286 | ||||||||||||||||||||
Herausgeber: |
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Verlag: | Springer | ||||||||||||||||||||
ISSN: | 1869-5590 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Helicopter blade, Windtunnel, Flow control, Dynamic stall, Back-flow flap, Experiment | ||||||||||||||||||||
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 Faserverbundleichtbau und Adaptronik > Multifunktionswerkstoffe Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO | ||||||||||||||||||||
Hinterlegt von: | Bachmann, Barbara | ||||||||||||||||||||
Hinterlegt am: | 21 Nov 2017 10:26 | ||||||||||||||||||||
Letzte Änderung: | 21 Nov 2023 14:50 |
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