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The influence of a non-adiabatic surface on boundary-layer transition induced by forward-facing steps

Costantini, Marco and Risius, Steffen and Klein, Christian (2016) The influence of a non-adiabatic surface on boundary-layer transition induced by forward-facing steps. 51st 3AF International Conference on Applied Aerodynamics Thermal effects and Aerodynamics, 04. - 06. Apr. 2016, Strasbourg, France.

Full text not available from this repository.

Official URL: http://www.3af-aerodynamics2016.com/

Abstract

The effect on step-induced boundary-layer transition of surface temperatures different from the adiabatic-wall temperature was investigated for a (quasi-) two-dimensional flow at a high subsonic Mach number and large Reynolds numbers. Sharp forward-facing steps were mounted on a flat plate and step-induced transition was studied non-intrusively by means of the temperature-sensitive paint technique. The experiments were conducted in the Cryogenic Ludwieg-Tube Göttingen with various streamwise pressure gradients and temperature differences between flow and model surface. A reduction of the ratio between surface and adiabatic-wall temperatures had a favourable influence on step-induced transition at low values of the step Reynolds number. However, at larger values of the step Reynolds number, the increase in transition Reynolds number for a given reduction in the wall temperature ratio was smaller. Transition was found to be insensitive to changes in wall temperature ratio for step Reynolds numbers above a certain value.

Item URL in elib:https://elib.dlr.de/99596/
Document Type:Conference or Workshop Item (Speech)
Additional Information:FP09-2016-costantini; Conference Proceedings on USB-Stick
Title:The influence of a non-adiabatic surface on boundary-layer transition induced by forward-facing steps
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Costantini, MarcoMarco.Costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Risius, Steffensteffen.risius (at) dlr.deUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-10
Status:Published
Keywords:Boundary layer transition; forward-facing steps; non-adiabatic surface; Temperature-Sensitive Paint
Event Title:51st 3AF International Conference on Applied Aerodynamics Thermal effects and Aerodynamics
Event Location:Strasbourg, France
Event Type:international Conference
Event Dates:04. - 06. Apr. 2016
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: Costantini, Dr.-Ing. Marco
Deposited On:26 Apr 2016 11:32
Last Modified:01 Dec 2016 15:39

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