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Thermography as a tool in wind tunnel testing

Fey, Uwe und Groot de, Klaus und Le Sant, Yves (2010) Thermography as a tool in wind tunnel testing. DLR-Interner Bericht. DLR-IB 224-2007 A 09, 25 S.

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Kurzfassung

The term “thermography” in general means the graphical visualization of temperature fields, or to give a more sophisticated definition: Thermography denotes the visualization and quantitative evaluation of the temperature on a body’s surface with the help of cameras (thermographic imaging). This is a widening of the method of thermometry, which in general denotes the measurement of temperatures using point sensors like thermo couples or resistance temperature detectors, for example. The most well known technique for thermographic imaging is the method of infrared thermography (IRT). In principle, IRT works by detecting the heat radiation emitted from a body surface with the help of suited sensors and calculating the corresponding temperature. In addition to IRT, several different techniques exist to visualize surface temperature variations. They are based on the temperature sensitivity of certain physical properties of molecules which are embedded in a binder matrix, i.e. they have to be applied to the surface as paint or as some kind of foil which can be bonded to the surface of interest. In the following sections the different methods for thermographic imaging will be described and their pros and cons with respect to their application in large wind tunnel testing will be highlighted. Special attention will be given to their usability as a tool for transition detection, i.e. the visualization of the laminar-turbulent transition of the boundary layer.

Dokumentart:Berichtsreihe (DLR-Interner Bericht)
Titel:Thermography as a tool in wind tunnel testing
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Fey, UweNICHT SPEZIFIZIERT
Groot de, KlausNICHT SPEZIFIZIERT
Le Sant, YvesONERA, Meudon, France
Datum:2010
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenanzahl:25
Status:veröffentlicht
Stichwörter:infrared thermography (IRT), temperature sensitive paint (TSP), thermographic liquid crystals (TLC)
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Konzepte & Integration
Standort: Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Experimentelle Verfahren
Institut für Aerodynamik und Strömungstechnik > Konfigurativer Entwurf
Hinterlegt von: Ilka Micknaus
Hinterlegt am:22 Sep 2010 09:00
Letzte Änderung:22 Sep 2010 09:00

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