Bauknecht, Andre und Raffel, Markus und Grebing, Benedikt (2018) Airborne Acquisition of Blade Tip Displacements and Vortices on a Coaxial Helicopter. Journal of Aircraft, 55 (5), Seiten 1995-2007. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C034647. ISSN 0021-8669.
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Offizielle URL: https://arc.aiaa.org/doi/10.2514/1.C034647
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 system was operated aboard a second helicopter to visualize the blade tip vortices of the ultralight helicopter in forward flight. The background-oriented schlieren 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/122023/ | ||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
Titel: | Airborne Acquisition of Blade Tip Displacements and Vortices on a Coaxial Helicopter | ||||||||||||||||
Autoren: |
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Datum: | 2018 | ||||||||||||||||
Erschienen in: | Journal of Aircraft | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||
Band: | 55 | ||||||||||||||||
DOI: | 10.2514/1.C034647 | ||||||||||||||||
Seitenbereich: | Seiten 1995-2007 | ||||||||||||||||
Verlag: | American Institute of Aeronautics and Astronautics (AIAA) | ||||||||||||||||
ISSN: | 0021-8669 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | flight test, coaxial, helicopter, deformation, rotor blade, SPR | ||||||||||||||||
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: | 17 Okt 2018 17:10 | ||||||||||||||||
Letzte Änderung: | 22 Nov 2023 07:32 |
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