Wolf, Christian und Mertens, Christoph und Gardner, Anthony und Dollinger, Christoph und Fischer, Andreas (2018) Optimisation of Differential Infrared Thermography for Unsteady Boundary Layer Transition Measurement. 44th European Rotorcraft Forum (ERF 2018), 2018-09-18 - 2018-09-21, Delft, The Netherlands.
Dieses Archiv kann nicht den Volltext zur Verfügung stellen.
Offizielle URL: https://www.erf2018.org
Kurzfassung
Differential infrared thermography (DIT) is a method of analyzing infrared images to measure the unsteady motion of the laminar-turbulent transition of a boundary layer. It uses the subtraction of two infrared images taken with a short time delay. DIT is a new technique which already demonstrated its validity in applications related to the unsteady aerodynamics of helicopter rotors in forward flight. The current study investigates a pitch-oscillating airfoil and proposes several optimizations of the original concept. These include the extension of DIT to steady test cases, a temperature compensation for long-term measurements, and a discussion of the proper infrared image separation distance. The current results also provide a deeper insight into the working principles of the technique. The results compare well to reference data acquired by unsteady pressure transducers, but at least for the current setup DIT results in an additional measurement-related lag for relevant pitching frequencies.
elib-URL des Eintrags: | https://elib.dlr.de/121386/ | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||
Titel: | Optimisation of Differential Infrared Thermography for Unsteady Boundary Layer Transition Measurement | ||||||||||||||||||||||||
Autoren: |
| ||||||||||||||||||||||||
Datum: | September 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, Infrared Measurements | ||||||||||||||||||||||||
Veranstaltungstitel: | 44th European Rotorcraft Forum (ERF 2018) | ||||||||||||||||||||||||
Veranstaltungsort: | Delft, The Netherlands | ||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||
Veranstaltungsbeginn: | 18 September 2018 | ||||||||||||||||||||||||
Veranstaltungsende: | 21 September 2018 | ||||||||||||||||||||||||
Veranstalter : | ERF / TU Delft | ||||||||||||||||||||||||
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: | 18 Okt 2018 15:35 | ||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:25 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags