Wolf, Christian und Braukmann, Johannes N. und Müller, Martin Michael (2022) Tip Vortex Study of a Rotor with Double-swept Blade Tips. In: 48th European Rotorcraft Forum, ERF 2022, Seiten 1-17. 48th European Rotorcraft Forum (ERF 2022), 2022-09-06 - 2022-09-08, Winterthur, Schweiz. ISBN 978-171387029-6.
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Offizielle URL: https://www.zhaw.ch/de/engineering/institute-zentren/zav/veranstaltungen/erf2022/
Kurzfassung
An experimental aerodynamic study was conducted, analyzing the wake structure of a four-bladed model rotor with a forward-backward swept tip geometry inspired by the ONERA-DLR "ERATO" design. Similar tip designs are used on some modern helicopter main rotors. The experiments were conducted at the rotor test stand Göttingen in hover-like conditions using a stereoscopic high-speed particle image velocimetry system. The results are compared with a reference rotor using a conventional parabolic blade tip. The test parameters include both constant-pitch cases and pitch-oscillating cases with a cyclic swashplate input. The constant-pitch tests show a two-step stall behavior for the double-swept tip, with the first step characterized by a reduced thrust slope and a reduced rotor efficiency. This effect is explained by a repositioning and a structural change of the tip vortex generation. The pitch-oscillating cases show that the double-swept tip results in an earlier tip stall compared to the parabolic geometry while maintaining high thrust levels. The dynamic tip stall yields a break down of the wake’s tip vortex system, which is replaced by a spanwise band with small-scale turbulent structures and trailed vorticity, but no large-scale vortices.
elib-URL des Eintrags: | https://elib.dlr.de/187972/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
Zusätzliche Informationen: | Vortrag mit Paper | ||||||||||||||||
Titel: | Tip Vortex Study of a Rotor with Double-swept Blade Tips | ||||||||||||||||
Autoren: |
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Datum: | September 2022 | ||||||||||||||||
Erschienen in: | 48th European Rotorcraft Forum, ERF 2022 | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Seitenbereich: | Seiten 1-17 | ||||||||||||||||
Herausgeber: |
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ISBN: | 978-171387029-6 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Tip vortex, rotor performance, ERATO rotor, High-speed stereoscopic particle image velocimetry, rotor test stand Göttingen | ||||||||||||||||
Veranstaltungstitel: | 48th European Rotorcraft Forum (ERF 2022) | ||||||||||||||||
Veranstaltungsort: | Winterthur, Schweiz | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 6 September 2022 | ||||||||||||||||
Veranstaltungsende: | 8 September 2022 | ||||||||||||||||
Veranstalter : | Centre for Aviation (ZAV) | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||
HGF - Programmthema: | Effizientes Luftfahrzeug | ||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | L EV - Effizientes Luftfahrzeug | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtueller Hubschrauber und Validierung | ||||||||||||||||
Standort: | Göttingen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO Institut für Aeroelastik > Aeroelastische Experimente | ||||||||||||||||
Hinterlegt von: | Carter, Beatrice | ||||||||||||||||
Hinterlegt am: | 23 Nov 2022 12:33 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:49 |
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