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Combination of Temperature-Sensitive Paint (TSP) and Carbon Nanotubes (CNT) for Transition Detection

Klein, Christian and Henne, Ulrich and Sachs, Werner and Ondrus, Vladimir and Beifuss, Uwe and Bruse, Martin and Löhr, Martin and Lesjak, Ralf and Becher, A. and Zhai, Junnai (2015) Combination of Temperature-Sensitive Paint (TSP) and Carbon Nanotubes (CNT) for Transition Detection. MOTAR Meeting 2015, 15. - 16. April 2015, Cologne, Germany.

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Boundary layer transition measurements on two wind tunnel models by means of Temperature-Sensitive Paint (TSP) in combination with Carbon Nanotubes (CNT) were performed in the high pressure wind tunnel DNW-HDG and in the cryogenic wind tunnel DNW-KKK. Both TSP and CNT can be applied by the airbrush technique to the wind tunnel models. No chemical or other interaction between CNT and TSP was observed. Therefore the CNT layer underneath the TSP layer could successfully be used to generate the required artificial temperature step dTau/dt°≈°1K/60 s for visualization of the laminar to turbulent transition on the wind tunnel model. Since the heating by CNT is very homogenous laminar-turbulent transition can already be seen in the raw images. Transition location change on the wind tunnel model as a function of Reynolds number and angle-of-attack are presented. By combination of TSP and CNT as a tool for transition detection measurements, the productivity of the data acquisition can be very much increased compared to the standard temperature step method (e.g. where the temperature of the test gas is varied) and no change in Reynolds number occurs, as would be the case when the gas temperature changes.

Item URL in elib:https://elib.dlr.de/96239/
Document Type:Conference or Workshop Item (Speech)
Title:Combination of Temperature-Sensitive Paint (TSP) and Carbon Nanotubes (CNT) for Transition Detection
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Henne, Ulrichulrich.henne (at) dlr.deUNSPECIFIED
Sachs, Wernerwerner.sachs (at) dlr.deUNSPECIFIED
Ondrus, VladimirUni HohenheimUNSPECIFIED
Beifuss, UweUni HohenheimUNSPECIFIED
Bruse, Martinmartin.bruse (at) dnw.aeroUNSPECIFIED
Lesjak, RalfRalf.Lesjak (at) dnw.aeroUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:TSP, Europium, laminar-turbulent, transition, carbon nanotubes (CNT)
Event Title:MOTAR Meeting 2015
Event Location:Cologne, Germany
Event Type:Workshop
Event Dates:15. - 16. April 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:04 Aug 2015 16:08
Last Modified:04 Aug 2015 16:08

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