Heineck, James T. und Overmeyer, Austin D. und Wolf, Christian und Raffel, Markus (2018) Boundary Layer Transition Visualization of a Helicopter Blade in Forward Flight Using Thermography. 18th International Symposium on Flow Visualization ISFV 18, 2018-06-26 - 2018-06-29, Zürich, Switzerland.
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Offizielle URL: https://www.isfv18.ethz.ch
Kurzfassung
The boundary layer transition detection technique by thermography has been extended to a wind tunnel model simulating helicopter forward flight conditions. The helicopter blade is a generic NASA RC series airfoil 66.75 in (1.7 m) span with a 5.45 in (13.8 cm) chord as a part of a three-blade system. Testing was done at the NASA Langley 14- x 22-foot Subsonic Wind Tunnel. The image de-rotation method was employed to improve signal-to-noise and for high-frequency image acquisition to enable the use of the Differential Infrared Thermography (DIT) technique. This method allows the visualization of changes in the transition front due to varying instantaneous in-flow conditions of the blade throughout the rotor disk. This paper describes the complex imaging installation, offers sample data processed with several techniques and discusses the relevance to CFD validation.
elib-URL des Eintrags: | https://elib.dlr.de/120713/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Boundary Layer Transition Visualization of a Helicopter Blade in Forward Flight Using Thermography | ||||||||||||||||||||
Autoren: |
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Datum: | Juni 2018 | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Boundary Layer Transition, Rotorcraft Blade Aerodynamics, Thermography, Differential Infrared Transition (DIT) Measurement | ||||||||||||||||||||
Veranstaltungstitel: | 18th International Symposium on Flow Visualization ISFV 18 | ||||||||||||||||||||
Veranstaltungsort: | Zürich, Switzerland | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsbeginn: | 26 Juni 2018 | ||||||||||||||||||||
Veranstaltungsende: | 29 Juni 2018 | ||||||||||||||||||||
Veranstalter : | ETH Zürich | ||||||||||||||||||||
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: | 04 Jul 2018 11:16 | ||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:24 |
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