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Infrared thermography for boundary layer transition measurements

Wolf, Christian and Gardner, Anthony and Raffel, Markus (2020) Infrared thermography for boundary layer transition measurements. Measurement Science and Technology, 31 (11), pp. 1-21. Institute of Physics (IOP) Publishing. doi: 10.1088/1361-6501/aba070. ISSN 0957-0233.

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Official URL: https://doi.org/10.1088/1361-6501/aba070

Abstract

Infrared thermography has been successfully adopted in the field of flow diagnostics over the last decades. Detecting the laminar{turbulent boundary layer transition through variations in the convective heat transfer is one of the primary applications due to its impact on the aerodynamic performance. Recent developments in fast{ response infrared cameras allow unsteady measurement of fast{moving surfaces and moving transition positions, which must consider the thermal responsiveness of the surface material. Experimental results on moving boundary layer transition positions are highly valuable in the design and optimization of airfoils or rotor blades in unsteady applications, for example regarding helicopter main rotors in forward flight. This review article summarizes recent developments in steady and unsteady infrared thermography, particularly focusing on the development of differential infrared thermography (DIT). The new methods have also led to advances in the analysis of unmoving boundary layer transition for static airfoil test cases which were previously difficult to analyze using single{image methods.

Item URL in elib:https://elib.dlr.de/135812/
Document Type:Article
Title:Infrared thermography for boundary layer transition measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wolf, ChristianChristian.Wolf (at) dlr.dehttps://orcid.org/0000-0002-9052-7548
Gardner, Anthonyanthony.gardner (at) dlr.dehttps://orcid.org/0000-0002-1176-3447
Raffel, MarkusMarkus.Raffel (at) dlr.dehttps://orcid.org/0000-0002-3340-9115
Date:23 September 2020
Journal or Publication Title:Measurement Science and Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:31
DOI :10.1088/1361-6501/aba070
Page Range:pp. 1-21
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDIOP Publishing LtdUNSPECIFIED
Publisher:Institute of Physics (IOP) Publishing
ISSN:0957-0233
Status:Published
Keywords:boundary layer, laminar-turbulent transition, infrared thermography
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 (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Carter, Beatrice
Deposited On:13 Oct 2020 11:10
Last Modified:13 Oct 2020 11:10

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