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Analysis of differential infrared thermography for boundary layer transition detection

Gardner, Anthony and Eder, C. and Wolf, Christian and Raffel, Markus (2017) Analysis of differential infrared thermography for boundary layer transition detection. Experiments in Fluids. Springer. DOI: 10.1007/s00348-017-2405-z ISSN 0723-4864

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Official URL: http://link.springer.com/journal/348


This paper presents an analysis of the differential infrared thermography (DIT) techn ique, a contactless method of measuring the unsteady movement of the boundary layer transition position on an unprepared surface. DIT has been shown to measure boundary layer positions which correlate weil with those from other measurement methods, andin this paper unsteady aerodynamics from a 2D URANS solution are used and the resulting wall temperatures computed. The results show that only the DIT peak can be anal ysed, but that this correlates weil with the boundary layer transition position. A small systematic time-lag of 1.5 ms cannot be reduced by using different surface materials, but the signal can be improved by using common plastics as a thin sheet on the surface.

Item URL in elib:https://elib.dlr.de/111821/
Document Type:Article
Additional Information:Published online: 18. August 2017; Exp Fluids (2017) 58:122
Title:Analysis of differential infrared thermography for boundary layer transition detection
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gardner, Anthonyanthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Eder, C.Department of Mechanical Engineering, BundeswehrUniversity Munich, 85577 Neubiberg, GermanyUNSPECIFIED
Wolf, ChristianChristian.Wolf (at) dlr.dehttps://orcid.org/0000-0002-9052-7548
Raffel, MarkusMarkus.Raffel (at) dlr.deUNSPECIFIED
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s00348-017-2405-z
Keywords:DIT, Infrared, thermography, boundary layer, transition, unsteady flows, measurement technique, validation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Bachmann, Barbara
Deposited On:21 Nov 2017 10:28
Last Modified:06 Sep 2019 15:25

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