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Investigation of Hybrid Laminar Flow Control (HLFC) on a 2D-Model in the Cryogenic Pilot European Transonic Windtunnel (PETW)

Hensch, Ann-Katrin and Guntermann, Peter and Longo, Roberto and Quest, Jürgen and Okfen, Patrick and Risius, Steffen and Klein, Christian and Schaber, Sven (2019) Investigation of Hybrid Laminar Flow Control (HLFC) on a 2D-Model in the Cryogenic Pilot European Transonic Windtunnel (PETW). In: AIAA Scitech Forum, 2019 (1181), pp. 1-6. AIAA ScienceTechnology Forum AIAA SciTech 2019, 07.– 11. Jan. 2019, San Diego, California, USA. DOI: 10.2514/6.2019-1181 ISBN 978-162410578-4

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Official URL: https://arc.aiaa.org/doi/pdf/10.2514/6.2019-1181


The application of Hybrid Laminar Flow Control (HLFC) by suction of the boundary layer has the potential to delay the location of laminar-turbulent transition and, hence, reduce the drag caused by skin friction. Up to now most of the research on HLFC has been performed at low Reynolds and Mach numbers. In order to investigate the technology at flow conditions relevant for today’s commercial flight additional work at higher Reynolds numbers is required. At high Reynolds numbers the major challenge is an appropriate scaling of the perforation used for sucking the boundary layer, leading to very small perforation diameters of only a few microns. In this paper, the applicability of HLFC on a two-dimensional wind tunnel profile is investigated in the cryogenic Pilot European Transonic Windtunnel (PETW). The natural laminar-turbulent boundary-layer transition is visualized with temperature-sensitive paint (TSP). The transition location obtained with an active HLFC system is compared to a reference case without HLFC for different angles-of-attack, Reynolds numbers, free stream Mach numbers and suction rates. Furthermore, the influence of the perforation diameter is also investigated. Results of an alternative approach, using a sintered material instead of a regular perforation for sucking the boundary layer, are also presented.

Item URL in elib:https://elib.dlr.de/126998/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://scitech.aiaa.org, AIAA-2019-1181
Title:Investigation of Hybrid Laminar Flow Control (HLFC) on a 2D-Model in the Cryogenic Pilot European Transonic Windtunnel (PETW)
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hensch, Ann-Katrinakh (at) etw.deUNSPECIFIED
Guntermann, Peterpg (at) etw.deUNSPECIFIED
Longo, Robertorlo (at) etw.deUNSPECIFIED
Quest, Jürgenjq (at) etw.deUNSPECIFIED
Okfen, Patrickpatrick-marcello.okfen (at) alumni.fh-aachen.deUNSPECIFIED
Risius, Steffensteffen.risius (at) dlr.dehttps://orcid.org/0000-0002-5530-9609
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Schaber, Svensven.schaber (at) airbus.comUNSPECIFIED
Date:January 2019
Journal or Publication Title:AIAA Scitech Forum, 2019
Refereed publication:Yes
Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2019-1181
Page Range:pp. 1-6
Series Name:Conference Proceedings online
Keywords:Hybrid Laminar Flow Control (HLFC) , European Transonic Windtunnel (PETW), natural laminar-turbulent boundary-layer, high Reynolds numbers
Event Title:AIAA ScienceTechnology Forum AIAA SciTech 2019
Event Location:San Diego, California, USA
Event Type:international Conference
Event Dates:07.– 11. Jan. 2019
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
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:10 Apr 2019 09:04
Last Modified:02 Aug 2019 13:22

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