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Combination of Temperature-Sensitive Paint and Carbon Nanotubes for Transition Detection

Klein, Christian and Henne, Ulrich and Bruse, Martin and Ondrus, Vladimir (2015) Combination of Temperature-Sensitive Paint and Carbon Nanotubes for Transition Detection. AIAA SciTech 2015, 05. - 09. Jan. 2015, Kissimmee, Florida, USA. doi: 10.2514/6.2015-1558.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2015-1558


For transition detection measurement in wind tunnels by means of Temperature-Sensitive Paint (TSP) or InfraRed Thermography (IRT), a sufficient temperature difference between laminar and turbulent boundary layer areas has to be established. If the Temperature difference, naturally occurring under adiabatic wall temperature conditions, is too small to be recognized by IRT or TSP, the magnitude of the temperature change in the laminar-to-turbulent transition area has to be enhanced artificially. Mainly known are two different methods based on heat transfer from the wind-tunnel flow to the model substrate to generate temperature differences: a) Temperature steps in the flow (cooling or heating of the flow) and b) Electrical heating of the model surface (established technique is using heating elements inside the model). A new technique arises from the use of carbon nanotubes (CNT). Materials based on that have a very high electrical heating capability (>1,000 lager than Copper) and can be mixed in a surface coating. Compared to classical heating foils the CNT coating technique has the advantage that a higher spatial homogeneity with respect to heating can be achieved and the applicable thickness of a CNT coating is in the order of micrometers. The presented paper describes the further development of the application of CNT in combination with TSP for transition detection in wind tunnels at high Reynolds numbers.

Item URL in elib:https://elib.dlr.de/91241/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2015-1558
Title:Combination of Temperature-Sensitive Paint and Carbon Nanotubes for Transition Detection
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 1-11
Series Name:Conference Proceedings online
Keywords:TSP, CNT
Event Title:AIAA SciTech 2015
Event Location:Kissimmee, Florida, USA
Event Type:international Conference
Event Dates:05. - 09. Jan. 2015
Organizer:American Institute of Aeronautics and Astronautics
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 (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
German-Dutch Windtunnels > Business Unit Göttingen und Köln (GUK)
Deposited By: Micknaus, Ilka
Deposited On:18 Feb 2015 14:50
Last Modified:18 Feb 2015 14:50

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