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Wall pressure signature in compressible turbulent boundary layers

Buchmann, Nicolas A. and Scharnovski, Sven and Ehrenfried, Klaus and Kähler, Christian (2015) Wall pressure signature in compressible turbulent boundary layers. In: Progress in Wall Turbulence 2 - Understanding and Modeling ERCOFTAC Series, 1 (-). Springer International Publishing. pp. 93-102. ISBN 978-90-481-9602-9. ISSN 1382-4309

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Official URL: http://www.springer.com/de/book/9783319203874


Large - scale turbulent flow structures associated with positive and negative wall pressure fluctuations in a compressible turbulent boundary layer are investigated. Experiments are conducted in a closed-loop transonic wind tunnel at Ma = 0.5 - 0.8, Ret=5,100-9,500 with combined velocity field and wall pressure measurements. Both velocity and pressure statistics are analysed and compare well with existing low Mach number data. Spatial two-point correlation is applied to determine the size and orientation of the large - scale flow structures, which depending on the wall height have an averaged length scales of 4-6 δ and a maximum inclination angel of ≈ 12o - 13o . The wall pressure fluctuations are associated with shear layer structures and it is shown that positive pressure fluctuations are correlated with low speed large - scale flow structure over streamwise extents of 4 - 5 δ.

Item URL in elib:https://elib.dlr.de/101328/
Document Type:Contribution to a Collection
Title:Wall pressure signature in compressible turbulent boundary layers
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Buchmann, Nicolas A.nicolas.buchmann (at) unibw.deUNSPECIFIED
Scharnovski, SvenUniBW MünchenUNSPECIFIED
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Kähler, ChristianUniBw MünchenUNSPECIFIED
Journal or Publication Title:Progress in Wall Turbulence 2 - Understanding and Modeling
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1007/978-3-319-20388-1_8
Page Range:pp. 93-102
Stanislas, MichelCNRS, LML, France
Jimenez, JavierPolytechnic University of Madrid, Spain
Marusic, IvanUniversity of Melbourne, Australia
Publisher:Springer International Publishing
Series Name:ERCOFTAC Series
Keywords:Compressible turbulent boundary layer, flow structures
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:18 Dec 2015 13:46
Last Modified:10 May 2016 23:39

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