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Experimental investigation of the effect of forward-facing steps on boundary layer transition

Costantini, Marco and Risius, Steffen and Klein, Christian (2014) Experimental investigation of the effect of forward-facing steps on boundary layer transition. IUTAM - ABCM Symposium on Laminar-Turbulent Transition, 08. - 12. Sept. 2014, Rio de Janeiro, Brazilien.

Full text not available from this repository.

Official URL: http://www.ndf.poli.usp.br/SLTT2014/index.html

Abstract

The effect of geometric forward-facing steps on boundary layer transition was experimentally investigated at high Reynolds numbers and at a high subsonic Mach number in a blow-down wind tunnel facility in Göttingen, Germany. Boundary layer transition was detected non-intrusively by means of the Temperature-Sensitive Paint (TSP) technique. Forward-facing steps of different heights were installed on a spanwise invariant wind tunnel model and various streamwise pressure gradients were considered. For all tested stability situations, the surface imperfections were shown to reduce the extent of the laminar region, with larger reductions being obtained with higher steps. The transition Reynolds number at a fixed combination of surface step height and streamwise pressure gradient was found to be independent of the chord Reynolds number. For a given combination of step height and chord Reynolds number, the decrease of the transition Reynolds number relative to the transition Reynolds number obtained for the smooth surface was observed to be larger at more pronounced negative pressure gradients.

Item URL in elib:https://elib.dlr.de/86506/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental investigation of the effect of forward-facing steps on boundary layer transition
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Costantini, MarcoMarco.Costantini (at) dlr.deUNSPECIFIED
Risius, Steffensteffen.risius (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-3
Series Name:Conference Proceedings on USB-Stick
Status:Published
Keywords:Boundary layer transition; forward-facing steps; Temperature-Sensitive Paint
Event Title:IUTAM - ABCM Symposium on Laminar-Turbulent Transition
Event Location:Rio de Janeiro, Brazilien
Event Type:international Conference
Event Dates:08. - 12. Sept. 2014
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 of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:27 Oct 2014 16:04
Last Modified:27 Oct 2014 16:04

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