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Transition Delay by Oblique Surface Roughness

Ost, Jonathan and Puckert, Dominik and Rist, U. and Klein, Christian and Henne, Ulrich (2017) Transition Delay by Oblique Surface Roughness. European Orag Reduction and Flow Control Meeting - EDRFCM 2017, 03.-06. Apr. 2017, Rom, Italien.

Full text not available from this repository.

Abstract

The laminar-turbulent Transition caused by Tollmien-Schlichting waves can be delay by introducing streaks of appropriate strength into the laminar boundary layer. lt has been shown numerically and experimentally that roughness elements can generate stable streaks of sufficient strength. The roughness elements tested so far have a wake of counter-rotating vortices. In the current work a different roughness type, i.e. an oblique surface roughness, with a wake of co-rotating vortices was successfully used to delay transition in the Laminarwasserkanal of the Institute of Aerodynamics and Gas Dynamics, University Stuttgart. The conditions of the transition were weil controlled and the temperature-sensitive paint (TSP) method and hot-film anemometry were used to investigate the flow.

Item URL in elib:https://elib.dlr.de/118612/
Document Type:Conference or Workshop Item (Speech)
Title:Transition Delay by Oblique Surface Roughness
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ost, JonathanJonathan.Ost (at) dlr.deUNSPECIFIED
Puckert, DominikUniversität StuttgartUNSPECIFIED
Rist, U.Uni StuttgartUNSPECIFIED
Klein, ChristianChristian.Klein (at) dlr.deUNSPECIFIED
Henne, UlrichUNSPECIFIEDUNSPECIFIED
Date:2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:TSP, Transition Delay, Roughness, Laminarwasserkanal
Event Title:European Orag Reduction and Flow Control Meeting - EDRFCM 2017
Event Location:Rom, Italien
Event Type:international Conference
Event Dates:03.-06. Apr. 2017
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: Bachmann, Barbara
Deposited On:31 Jan 2018 11:40
Last Modified:13 Mar 2018 11:06

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