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Application of Carbon Nanotubes (CNT) and Temperature-Sensitive Paint (TSP) for the Detection of Boundary Layer Transition

Klein, Christian and Henne, Ulrich and Sachs, Werner and Beifuss, Uwe and Ondrus, Vladimir and Bruse, Martin and Lesjak, Ralf and Löhr, Martin (2014) Application of Carbon Nanotubes (CNT) and Temperature-Sensitive Paint (TSP) for the Detection of Boundary Layer Transition. 52nd AIAA Aerospace Sciences Meeting (AIAA SciTech 2014), 13. - 17. January 2014, Gaylord National, Maryland, USA.

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Official URL: http://arc.aiaa.org | DOI: 10.2514/6.2014-1482

Abstract

For aerodynamic profile tests on aircraft or wind mill models, transition detection is generally of great interest. Under ambient flow conditions the infrared technique (IR) is a well-established image-based method to carry this out. In high Reynolds number tests which are conducted at low temperatures or at high pressures the IR technique does not work very well whereas the Temperature-Sensitive Paint (TSP) technique is in principle well-suited to operate under these conditions. However, for the use of TSP at high pressures the feasibility has to be checked and some technical aspects have to be solved. Boundary layer transition detection by means of TSP generally requires an artificial temperature step to enhance the temperature difference between the laminar and turbulent boundary layers. This paper presents combination of TSP and Carbon Nanotubes (CNT) to generate a well-defined temperature step to detect laminar-turbulent transition. After pre-testing CNT and TSP in the laboratory, a wind tunnel experiment was conducted in the high pressure wind tunnel in Göttingen (DNW-HDG) for laminar-turbulent transition detection on a two-dimensional model for Re ≤ 8 Mio.

Item URL in elib:https://elib.dlr.de/86695/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA 2014-1482; DOI: 10.2514/6.2014-1482
Title:Application of Carbon Nanotubes (CNT) and Temperature-Sensitive Paint (TSP) for the Detection of Boundary Layer Transition
Authors:
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
Beifuss, UweUni HohenheimUNSPECIFIED
Ondrus, VladimirUni HohenheimUNSPECIFIED
Bruse, MartinMartin.Bruse (at) dnw.aeroUNSPECIFIED
Lesjak, RalfRalf.Lesjak (at) dnw.aeroUNSPECIFIED
Löhr, MartinUNSPECIFIEDUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-8
Series Name:Conference Proceedings online
Status:Published
Keywords:Carbon Nanotubes (CNT), Temperature-Sensitive Paint (TSP), Boundary Layer Transition, high pressure wind tunnel in Göttingen (DNW-HDG), laminar-turbulent transition detection
Event Title:52nd AIAA Aerospace Sciences Meeting (AIAA SciTech 2014)
Event Location:Gaylord National, Maryland, USA
Event Type:international Conference
Event Dates:13. - 17. January 2014
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:German-Dutch Windtunnels > Business Unit Göttingen und Köln (GUK)
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:17 Feb 2014 13:12
Last Modified:21 Oct 2014 10:36

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