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.
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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/ | ||||||||||||
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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: |
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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 (old) | ||||||||||||
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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