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A Wind Tunnel Experiment for Symmetric Wakes in Adverse Pressure Gradients

Breitenstein, Wiebke and Scholz, Peter and Radespiel, Rolf and Burnazzi, Marco and Knopp, Tobias and Guseva, Ekatarina and Shur, Michael and Strelets, Michael (2019) A Wind Tunnel Experiment for Symmetric Wakes in Adverse Pressure Gradients. In: AIAA Scitech Forum, 2019. American Institute of Aeronautics and Astronautics Inc, AIAA. AIAA Science and Technology Forum AIAA SciTech 2019, 07.-11.01.2019, San Diego, CA, USA. DOI: 10.2514/6.2019-1875 ISBN 978-162410578-4

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Official URL: https://doi.org/10.2514/6.2019-1875

Abstract

High-lift-systems in modern transport aircraft provide the necessary lift for low-speedoperations, such as take-off and landing. While RANS-based computations yield good results for the wing design in cruise conditions, for high lift at low speed the same level of reliability has not been achieved due to the complexity of the high-lift flows caused by interaction of several challenging flow features. This applies especially to wakes subjected to a strong adverse pressure gradient. With this motivation, a new experimental entry was launched, whose ultimate objective is to create a comprehensive database for validation and improvement of RANS turbulence models as applied to this type of flows. In the present work first results are presented of such an entry started recently at the Technische Universität Braunschweig in the framework of the joint German-Russian project "Wake flows in Adverse Pressure Gradients". A new experimental setup is outlined, which includes a flat plate as wake generator and a symmetrical installation of two thin liner foil pairs imposing a strong adverse pressure gradient in the wake area. Along with this, some results are shown of preliminary 2D and 3D RANS computations used for the aerodynamic design of the experimental flow model. On the other hand, results of the first measurements at the design point are presented and their sensitivity to key setup parameters is discussed.

Item URL in elib:https://elib.dlr.de/124680/
Document Type:Conference or Workshop Item (Speech)
Title:A Wind Tunnel Experiment for Symmetric Wakes in Adverse Pressure Gradients
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Breitenstein, WiebkeTU Braunschweig, ISMUNSPECIFIED
Scholz, PeterTU Braunschweig, ISMUNSPECIFIED
Radespiel, RolfTU Braunschweig, ISMUNSPECIFIED
Burnazzi, MarcoDLR AS CASUNSPECIFIED
Knopp, TobiasDLR AS CASUNSPECIFIED
Guseva, EkatarinaSt. Petersburg Polytechnic UniversityUNSPECIFIED
Shur, MichaelSt. Petersburg Polytechnic UniversityUNSPECIFIED
Strelets, MichaelSt. Petersburg Polytechnic UniversityUNSPECIFIED
Date:6 January 2019
Journal or Publication Title:AIAA Scitech Forum, 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.2514/6.2019-1875
Publisher:American Institute of Aeronautics and Astronautics Inc, AIAA
Series Name:Conference Proceedings online
ISBN:978-162410578-4
Status:Published
Keywords:Wake flow; Adverse pressure Gradient; Data base; RANS
Event Title:AIAA Science and Technology Forum AIAA SciTech 2019
Event Location:San Diego, CA, USA
Event Type:international Conference
Event Dates:07.-11.01.2019
Organizer:AIAA
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 > CASE, GO
Deposited By: Knopp, Dr.rer.nat. Tobias
Deposited On:18 Dec 2019 17:04
Last Modified:18 Dec 2019 17:04

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