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Investigation of stationary-crossflow-instability induced transition with the 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 Streit, Thomas and Schaber, Sven (2019) Investigation of stationary-crossflow-instability induced transition with the temperature-sensitive paint method. Experimental Thermal and Fluid Science, 109 (109848), pp. 1-10. Elsevier. DOI: 10.1016/j.expthermflusci.2019.109848 ISSN 0894-1777

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Official URL: https://www.sciencedirect.com/science/article/pii/S0894177718317692


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 airfoil. 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 determined. The test is performed with three different conditions of the leading-edge surface: highly polished, unpolished, and highly polished with discrete roughness elements applied. 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. 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.

Item URL in elib:https://elib.dlr.de/128035/
Document Type:Article
Additional Information:Paper DOI: doi.org/10.1016/j.expthermflusci.2019.109848
Title:Investigation of stationary-crossflow-instability induced transition with the temperature-sensitive paint method
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lemarechal, JonathanJonathan.Lemarechal (at) dlr.dehttps://orcid.org/0000-0002-3333-2664
Costantini, Marcomarco.costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Klein, Christianchristian.klein (at) dlr.dhttps://orcid.org/0000-0001-7592-6922
Kloker, Markus J.markus.kloker (at) iag.uni-stuttgart.deUNSPECIFIED
Würz, Wernerwerner.wuerz (at) iag.uni-stuttgart.deUNSPECIFIED
Kurz, Holger B.E.IAG Universität StuttgartUNSPECIFIED
Streit, Thomasth.streit (at) dlr.deUNSPECIFIED
Schaber, Svensven.schaber (at) airbus.comUNSPECIFIED
Date:December 2019
Journal or Publication Title:Experimental Thermal and Fluid Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.expthermflusci.2019.109848
Page Range:pp. 1-10
Series Name:Science Direct, ELSEVIER
Keywords:laminar-turbulent transition, stationary crossflow instability, upstream flow deformation, UFD discreteroughness elements, DRE, transition delay, temperature-sensitive paint method, TSP, swept-wing wind-tunnel modeldesign
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
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: Braunschweig , Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Micknaus, Ilka
Deposited On:26 Jun 2019 16:44
Last Modified:06 Sep 2019 15:25

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