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Investigation of the Law-of-the-Wall for a Turbulent Boundary Layer Flow Subject to an Adverse Pressure Gradient Using Particle Imaging

Knopp, Tobias and Schanz, Daniel and Schröder, Andreas and Buchmann, Nicolas A. and Cierpka, Christian and Hain, Rainer and Kähler, Christian J. (2016) Investigation of the Law-of-the-Wall for a Turbulent Boundary Layer Flow Subject to an Adverse Pressure Gradient Using Particle Imaging. In: New Results in Numerical and Experimental Fluid Mechanics X Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 132. Springer International Publishing Switzerland 2016. pp. 177-187. ISBN 978-3-319-27278-8. ISSN 1612-2909

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Official URL: http://link.springer.com/book/10.1007/978-3-319-27279-5/page/2

Abstract

We present an experimental investigation and data analysis of a turbulent boundary layer flow at a significant adverse pressure gradient for two Reynolds numbers Re_theta=6200 and Re_theta=8000. We perform detailed multi-resolution measurements by combining large-scale and long-range microscopic particle imaging. The flow is designed to be close to equilibrium in the sense that characteristic integral flow parameters evolve slowly in streamwise direction to study scaling laws for the mean velocity and for the total shear stress in the inner part of the boundary layer. In the inner part of the inner layer the mean velocity can be fitted by a log-law. We observe larger values for the log-law slope than in zero-pressure gradient flows and study possible history effects. The outer part can be described by a modified log-law, which depends on the pressure gradient parameter and on a parameter for the effect of the mean inertial terms. Finally we present a new composite profile for the mean velocity.

Item URL in elib:https://elib.dlr.de/91785/
Document Type:Contribution to a Collection
Title:Investigation of the Law-of-the-Wall for a Turbulent Boundary Layer Flow Subject to an Adverse Pressure Gradient Using Particle Imaging
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knopp, TobiasTobias.Knopp (at) dlr.deUNSPECIFIED
Schanz, Danieldaniel.schanz (at) dlr.deUNSPECIFIED
Schröder, Andreasandreas.schroeder (at) dlr.deUNSPECIFIED
Buchmann, Nicolas A.UniBW MünchenUNSPECIFIED
Cierpka, ChristianUniBW MünchenUNSPECIFIED
Hain, RainerUni BW München, Inst f Strömungsmechanik und AerodynamikUNSPECIFIED
Kähler, Christian J.Uni BW München, Inst f Strömungsmechanik und AerodynamikUNSPECIFIED
Date:January 2016
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics X
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:132
DOI :10.1007/978-3-319-27279-5_16
Page Range:pp. 177-187
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus Deutschland, Bremen, Germany
Krämer, EwaldUNI Stuttgart
Wagner, ClausDLR Göttingen
Breitsamer, ChristianTU München
Publisher:Springer International Publishing Switzerland 2016
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-319-27278-8
Status:Published
Keywords:turbulent boundary layer, adverse pressure gradient, log-law, scaling law, PIV, PTV, particle imaging
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 , Stuttgart
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Bachmann, Barbara
Deposited On:07 Jul 2016 14:01
Last Modified:22 Jan 2018 16:50

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