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Influence of suction on step-induced boundary-layer transition

Dimond, Benjamin and Costantini, Marco and Risius, Steffen and Fuchs, Carsten and Klein, Christian (2018) Influence of suction on step-induced boundary-layer transition. In: 5th International Conference on Experimental Fluid Mechanics 2018 (68), pp. 167-172. 5th International Conference on Experimental Fluid Mechanics 2018, 02.-04. July 2018, Munich, Germany. DOI: 10.18726/2018_2 ISBN 978-3-943207-32-3

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Official URL: https://athene-forschung.unibw.de/124181


The influence of suction on step-induced boundary-layer transition has been experimentally investigated in the Cryogenic Ludwieg-Tube Goettingen at large chord Reynolds numbers (up to 16 MIllion), Mach numbers from 0.35 to 0.77 and various stream wise pressure gradients by means of Temperature-Sensitive Paint (TSP). Surface imperfections, implemented as combination of gap and forward facing step, caused transition to occur at a location more upstream than in case of a smooth surface (i.e. without gap and step). It was found that suction, achieved passively by exploiting the pressure difference between upper and lower side of the model, induced a movement of transition to a more downstream location than on the smooth configuration at the same test conditions. Thus, the effect of suction was to even overcompensate the adverse effect of the combination of gap and forward-facing step on boundary-layer transition.

Item URL in elib:https://elib.dlr.de/122704/
Document Type:Conference or Workshop Item (Speech)
Title:Influence of suction on step-induced boundary-layer transition
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dimond, Benjaminbenjamin.dimond (at) dlr.deUNSPECIFIED
Costantini, MarcoMarco.Costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Risius, Steffensteffen.risius (at) dlr.dehttps://orcid.org/0000-0002-5530-9609
Fuchs, Carstencarsten.fuchs (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Date:July 2018
Journal or Publication Title:5th International Conference on Experimental Fluid Mechanics 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.18726/2018_2
Page Range:pp. 167-172
Kähler, Christian J.UNSPECIFIED
Scharnowski, SvenUNSPECIFIED
Series Name:Conference Proceedings online
Keywords:Laminar-Turbulent Transition, Suction, Surface Imperfections, Temperature-Sensitive Paint
Event Title:5th International Conference on Experimental Fluid Mechanics 2018
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:02.-04. July 2018
Organizer:Universität der Bundeswehr München
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV / AS-DSL
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:03 Dec 2018 17:08
Last Modified:03 Dec 2018 17:08

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