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Active Separation Control at the Pylon-Wing Junction of a Real-Scale Model

Schlösser, Philipp and Soudakov, Vitaly and Bauer, Matthias and Wild, Jochen (2018) Active Separation Control at the Pylon-Wing Junction of a Real-Scale Model. AIAA Journal, 57 (1), pp. 132-141. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.J057345. ISSN 0001-1452.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://doi.org/10.2514/1.J057345


The effect of active flow control on local flow separation behind the installation Location of an ultra-high-bypass-ratio nacelle is investigated in a real-scale experiment at the TsAGI T-101 wind tunnel. The investigated model represents a swept 2.5D-section of the pylon-wing junction in landing configuration. A flow control system employing periodic excitation is integrated into the unprotected leading edge inboard of the pylon. Tuft visualization as well as pressure and force measurements are used to investigate the vortex-dominated base flow and the effect of active flow control. It is shown that the flow control effect is governed by the normalized parameters of flow control, the momentum coefficient and the velocity ratio, and is largely independent of the free-stream Mach and Reynolds number within the investigated range. The influence of a variation of the momentum coefficient c_µ on the lift gain is investigated. At the highest Reynolds number of Re = 10.7 · 10^6 an application of active flow control with c_µ = 1:08% fully eliminates local separation and increases total lift by approximately 2% of the respective baseline value across a range of 5 degrees in angle of attack.

Item URL in elib:https://elib.dlr.de/124549/
Document Type:Article
Title:Active Separation Control at the Pylon-Wing Junction of a Real-Scale Model
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schlösser, PhilippAirbus Defence and SapceUNSPECIFIEDUNSPECIFIED
Wild, JochenUNSPECIFIEDhttps://orcid.org/0000-0002-2303-3214UNSPECIFIED
Date:28 October 2018
Journal or Publication Title:AIAA Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 132-141
EditorsEmailEditor's ORCID iDORCID Put Code
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:high-lift, active flow control, separation control, aircraft, pulsed blowing, pulsed jet actuation, wind tunnel test, full scale
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 - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Wild, Dr.-Ing. Jochen
Deposited On:14 Dec 2018 14:04
Last Modified:20 Jun 2021 15:51

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