Bauknecht, André und Grebing, Benedikt und Raffel, Markus (2017) Airborne Acquisition of Blade Tip Displacements and Vortices on a Coaxial Ultralight Helicopter. In: 33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017. AIAA Aviation and Aeronautics Forum and Exposition 2017, 2017-06-05 - 2017-06-09, Denver, CO, USA. doi: 10.2514/6.2017-3552.
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Offizielle URL: http://aviation.aiaa.org/Forum.aspx?id=31203
Kurzfassung
A series of comprehensive flight tests investigated the flight dynamics and explored the flight envelope of a newly developed ultralight, coaxial, counter-rotating helicopter from the company edm aerotec. The present paper focuses on optical measurement techniques that were applied to study the minimum blade tip clearance and convection of blade tip vortices around the dual-rotor system. A calibrated single-camera system was used to quantify the movement and distances of the blade tips at a critical rotor azimuth for multiple steady and unsteady flight maneuvers. The measurements allowed critical flight conditions to be identified and provided flight data for the validation of comprehensive rotor codes. In an additional flight test, an airborne background-oriented schlieren (BOS) system was operated aboard a second helicopter to visualize the blade tip vortices of the ultralight helicopter in forward flight. The BOS measurements resulted in the first visualization of blade-vortex and vortex-structure interaction effects on a full-scale coaxial helicopter. The application of optical measurement systems in the present flight tests gives valuable insight into the aerodynamics and blade dynamics of a free-flying counter-rotating helicopter and demonstrates how these methods can effectively support the development process of new rotorcraft.
elib-URL des Eintrags: | https://elib.dlr.de/113264/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
Zusätzliche Informationen: | Abstract | ||||||||||||||||
Titel: | Airborne Acquisition of Blade Tip Displacements and Vortices on a Coaxial Ultralight Helicopter | ||||||||||||||||
Autoren: |
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Datum: | 2017 | ||||||||||||||||
Erschienen in: | 33rd AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2017 | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
DOI: | 10.2514/6.2017-3552 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | Coaxial ultralight rotorcraft technology, flight test, blade tip displacement, blade tip vortex visualization, background-oriented schlieren | ||||||||||||||||
Veranstaltungstitel: | AIAA Aviation and Aeronautics Forum and Exposition 2017 | ||||||||||||||||
Veranstaltungsort: | Denver, CO, USA | ||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 5 Juni 2017 | ||||||||||||||||
Veranstaltungsende: | 9 Juni 2017 | ||||||||||||||||
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: | Bachmann, Barbara | ||||||||||||||||
Hinterlegt am: | 05 Okt 2017 16:58 | ||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:17 |
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