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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, 58 (122), pp. 1-14. Springer Nature. doi: 10.1007/s00348-017-2405-z. ISSN 0723-4864.

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Official URL: https://doi.org/10.1007/s00348-017-2405-z

Abstract

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, and in 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
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gardner, AnthonyUNSPECIFIEDhttps://orcid.org/0000-0002-1176-3447134929449
Eder, C.Department of Mechanical Engineering, BundeswehrUniversity Munich, 85577 Neubiberg, GermanyUNSPECIFIEDUNSPECIFIED
Wolf, ChristianUNSPECIFIEDhttps://orcid.org/0000-0002-9052-7548UNSPECIFIED
Raffel, MarkusUNSPECIFIEDhttps://orcid.org/0000-0002-3340-9115133715991
Date:18 August 2017
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:58
DOI:10.1007/s00348-017-2405-z
Page Range:pp. 1-14
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDSpringerUNSPECIFIEDUNSPECIFIED
Publisher:Springer Nature
ISSN:0723-4864
Status:Published
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 (old)
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:02 Apr 2024 15:49

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