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Investigation of Stationary-Crossflow-Instability Induced Transition with Temperature-Sensitive Paint Method

Lemarechal, Jonathan and Costantini, Marco and Klein, Christian and Kloker, Markus J. and Würz, Werner and Kurz, Holger B.E. and Schaber, Sven (2018) Investigation of Stationary-Crossflow-Instability Induced Transition with Temperature-Sensitive Paint Method. In: Proceedings of the 5th International Conference on Experimental Fluid Mechanics, p. 81. 5th International Conference on Experimental Fluid Mechanics – ICEFM 2018 Munich, 02.07.2018-04.07.2018, München, Germany. DOI: 10.18726/2018_2 ISBN 978-3-943207-32-3

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Official URL: https://athene-forschung.rz.unibw-muenchen.de/124410

Abstract

The Temperature-Sensitive Paint (TSP) method is used for surface-based flow visualizations on a swept-wing wind-tunnel model with a generic natural laminar-flow profile. Within the investigated parameter range the stationary crossflow instability is the dominating instability mechanism. Based on the TSP results the location of the laminar-turbulent transition and the most amplified wavenumber of the stationary crossflow instability are derived. The test is performed with three different conditions of the leading-edge surface: highly polished, unpolished, and highly polished with discrete roughness elements applied. With the discrete roughness elements, i.e. cylindrical elements with micron-sized height, the transition could be delayed successfully for certain conditions. Local low-frequency movement of the beginning of turbulent wedges was detected for some data points with an unpolished leading edge. The Temperature-Sensitive Paint method has proven to have sufficient spatial resolution and temperature sensitivity to resolve skin friction variations to detect the footprint of stationary crossflow vortices even inside of turbulent wedges.

Item URL in elib:https://elib.dlr.de/120937/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of Stationary-Crossflow-Instability Induced Transition with Temperature-Sensitive Paint Method
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lemarechal, Jonathanjonathan.lemarechal (at) dlr.deUNSPECIFIED
Costantini, MarcoMarco.Costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Kloker, Markus J.University of Stuttgart, Institute of Aerodynamics and Gas DynamicsUNSPECIFIED
Würz, WernerUniversity of Stuttgart, Institute of Aerodynamics and Gas DynamicsUNSPECIFIED
Kurz, Holger B.E.University of Stuttgart, Institute of Aerodynamics and Gas DynamicsUNSPECIFIED
Schaber, SvenAirbus Operations, BremenUNSPECIFIED
Date:2 July 2018
Journal or Publication Title:Proceedings of the 5th International Conference on Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.18726/2018_2
Page Range:p. 81
Editors:
EditorsEmail
Kähler, C.J.UNSPECIFIED
Hain, R.UNSPECIFIED
Scharnowski, S.UNSPECIFIED
Fuchs, T.UNSPECIFIED
Series Name:Conference Proceedings online
ISBN:978-3-943207-32-3
Status:Published
Keywords:Temperature-Sensitive Paint, TSP, Laminar-Turbulent Transition, Stationary Crossflow Instability, Upstream Flow Deformation, UFD, Discrete Roughness Elements, DRE
Event Title:5th International Conference on Experimental Fluid Mechanics – ICEFM 2018 Munich
Event Location:München, Germany
Event Type:international Conference
Event Dates:02.07.2018-04.07.2018
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:16 Jul 2018 07:49
Last Modified:23 Jul 2018 07:56

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