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Investigation of a high Reynolds number turbulent boundary layer flow with adverse pressure gradients using PIV and 2D- and 3D- Shake-The-Box

Schröder, Andreas and Schanz, Daniel and Novara, Matteo and Philipp, Florian and Geisler, Reinhard and Knopp, Tobias and Schroll, Michael and Willert, Christian (2018) Investigation of a high Reynolds number turbulent boundary layer flow with adverse pressure gradients using PIV and 2D- and 3D- Shake-The-Box. In: 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics (257). 19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, 16.-19. Jul. 2018, Lisbon, Portugal.

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Official URL: http://www.lisbon-lasersymposium.org/lxlaser2018

Abstract

We present an experimental adverse pressure gradient turbulent boundary layer (TBL) flow investigation at high Reynolds numbers (approx. 10.000 < Re < 40.000) using large field Multi camera 2D PIV and three different particle tracking methods based on the Shake The Box (STB) technique, namely time resolved 2D and 3D STB and Multi Pulse (MP) STB. The experiments were performed within the frame of the DLR project Victoria and conducted in the Eiffel type atmospheric wind tunnel of the University of Armed Forces in Munich (AWM), which has a 22m long test section with a rectangular cross section of 1.8 x1.8 m^2. After a ramp the TBL develops along a flat plate with nearly zero pressure gradients (ZPG) to an equilibrium state before it enters into a 2D diffusor geometry following a smooth and moderate curvature into a flat plate at ~18° inclination angle while undergoing a significant adverse pressure gradient (APG) leading to flow separation. The measurements have been performed with an embedded field of view (FOV) strategy. A statistical significant number of samples for four different free stream velocities have been acquired at several positions in all pressure gradient regimes down to the region of (intermittent) flow separation. A large number of instantaneous velocity vector fields and time resolved particle tracks of the boundary layer flow have been achieved in order to gain high resolution wall normal profiles of the mean velocities and related Reynolds stresses <u_i u_j> in a first step.

Item URL in elib:https://elib.dlr.de/121221/
Document Type:Conference or Workshop Item (Speech)
Additional Information:2.2 Turbulent Boundary Layers I
Title:Investigation of a high Reynolds number turbulent boundary layer flow with adverse pressure gradients using PIV and 2D- and 3D- Shake-The-Box
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schröder, Andreasandreas.schroeder (at) dlr.dehttps://orcid.org/0000-0002-6971-9262
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Novara, Matteomatteo.novara (at) dlr.deUNSPECIFIED
Philipp, Florianflorian.philipp (at) dlr.deUNSPECIFIED
Geisler, ReinhardReinhard.Geisler (at) dlr.deUNSPECIFIED
Knopp, TobiasTobias.Knopp (at) dlr.deUNSPECIFIED
Schroll, MichaelMichael.Schroll (at) dlr.dehttps://orcid.org/0000-0003-0736-546X
Willert, ChristianChris.Willert (at) dlr.dehttps://orcid.org/0000-0002-1668-0181
Date:16 July 2018
Journal or Publication Title:19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Conference Proceedings online
Status:Published
Keywords:turbulent boundary layer, wall shear stress, particle image velocimetry, PIV, particle tracking velocimetry, PTV, long-range micro PIV, turbulence, flow visualization, image-based velocimetry, shake-the-box, STB
Event Title:19th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:16.-19. Jul. 2018
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 - VicToria
Location: Göttingen , Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute for Aerodynamics and Flow Technology > CASE, GO
Institute of Propulsion Technology > Engine Measurement Systems
Deposited By: Micknaus, Ilka
Deposited On:09 Nov 2018 13:22
Last Modified:31 Jul 2019 20:19

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