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Detection of Lambda- and Omega-vortices with the temperature-sensitive paint method in the late stage of controlled laminar-turbulent transition

Lemarechal, Jonathan and Klein, Christian and Henne, Ulrich and Pucker, Dominik K. and Rist, Ulrich (2019) Detection of Lambda- and Omega-vortices with the temperature-sensitive paint method in the late stage of controlled laminar-turbulent transition. Experiments in Fluids, 60 (91), pp. 1-14. Springer. DOI: 10.1007/s00348-019-2734-1 ISSN 0723-4864

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Official URL: https://link.springer.com/article/10.1007/s00348-019-2734-1

Abstract

An experiment investigating the laminar–turbulent transition of a Blasius boundary-layer-like fow was set up in the laminar water channel at the Institute of Aerodynamics and Gas Dynamics, University of Stuttgart. The late stage of controlled transition with K-type breakdown was investigated with the temperature-sensitive paint (TSP) method on the fat-plate surface. Additional velocity measurements in the boundary layer were performed with the hot-flm anemometry for better interpretation of the TSP results. The test conditions enable the TSP method to resolve the complete transition process temporally and spatially. Therefore, it was possible to detect the coherent structures occurring in the late stage of laminar–turbulent transition from the visualizations on the fat-plate surface: namely, Lambda- and Omega-vortices. The transition location is derived from the TSP visualizations with a gradient-based method and with the Turbulence Energy Recognition Algorithm (TERA) from the velocity measurements. The derived average transition location shows good agreement between the two techniques, but the TSP method detected a later beginning and earlier end of transition.

Item URL in elib:https://elib.dlr.de/127517/
Document Type:Article
Additional Information:Print ISSN 0723-4864 Online ISSN 1432-1114
Title:Detection of Lambda- and Omega-vortices with the temperature-sensitive paint method in the late stage of controlled laminar-turbulent transition
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lemarechal, JonathanJonathan.Lemarechal (at) dlr.dehttps://orcid.org/0000-0002-3333-2664
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Henne, Ulrichulrich.henne (at) dlr.deUNSPECIFIED
Pucker, Dominik K.Institut für Aerodynamik und Gasdynamik, Universität StuttgartUNSPECIFIED
Rist, UlrichInstitut für Aerodynamik und Gasdynamik, Universität StuttgartUNSPECIFIED
Date:16 May 2019
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:60
DOI :10.1007/s00348-019-2734-1
Page Range:pp. 1-14
Editors:
EditorsEmail
UNSPECIFIEDSpringer Berlin Heidelberg
Publisher:Springer
Series Name:Springer Verlag GmbH Germany, part of Springer Nature 2019
ISSN:0723-4864
Status:Published
Keywords:Temperature-Sensitve Paint method, TSP, controlled transition, K-type transition, Lambda-vortex, Omega-vortex
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
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:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:13 Jun 2019 15:29
Last Modified:06 Sep 2019 15:25

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