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Linear and Nonlinear Growth of Secondary Instabilities of Stationary Crossflow Vortices Studied by Parabolized Stability Equations

Hein, Stefan (2018) Linear and Nonlinear Growth of Secondary Instabilities of Stationary Crossflow Vortices Studied by Parabolized Stability Equations. In: New Results in Numerical and Experimental Fluid Mechanics XI Notes on Numerical Fluid Mechanics and Multidisciplinary Design 136, 136. Springer. pp. 219-228. ISBN 978-3-319-64518-6. ISSN 1612-2909

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Official URL: https://link.springer.com/

Abstract

Laminar-turbulent transition in (quasi-) three-dimensional boundary layers dominated by stationary crossflow vortices is studied for the setup of the DLR swept-flat plate experiment. The linear and subsequent nonlinear development of both the stationary crossflow vortices and their high-frequency secondary instabilities are modelled by nonlinear parabolized stability equations (PSE). In contrast to previous work, secondary instability theory is used only for initialization of secondary instabilities within the PSE analysis. Thereby, the nonlinear development of secondary instabilities including the generation of higher harmonics could be studied up to the stages where the feedback of the finite-amplitude secondary instability modes on the stationary crossflow vortices is no longer negligible and the skin-friction coefficient starts to deviate from that due to the mean flow distortion caused by the stationary crossflow modes alone. Moreover, the present approach allows rather efficient studies on the nonlinear development of secondary instabilities independent of their frequency.

Item URL in elib:https://elib.dlr.de/111211/
Document Type:Contribution to a Collection
Additional Information:Paper DOI:10.1007/978-3-319-64519-3_20; ISSN 1860-0824 (electronic); ISBN 978-3-319-64519-3 (eBook)
Title:Linear and Nonlinear Growth of Secondary Instabilities of Stationary Crossflow Vortices Studied by Parabolized Stability Equations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hein, Stefanstefan.hein (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:136
DOI :10.1007/978-3-319-64519-3
Page Range:pp. 219-228
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus Bremen
Krämer, EwaldUNI Stuttgart
Wagner, ClausDLR Göttingen
Bansmer, StephanTU Braunschweig
Radespiel, RolfTU Braunschweig
Semaan, RichardTU Braunschweig
Publisher:Springer
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design 136
ISSN:1612-2909
ISBN:978-3-319-64518-6
Status:Published
Keywords:laminar-turbulent transition, DLR swept flat plate experiment, three-dimensional boundary layer, parabolized stability equations NOLOT/PSE, secondary instability theory
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 > High Speed Configurations, GO
Deposited By: Bachmann, Barbara
Deposited On:13 Dec 2017 14:44
Last Modified:24 May 2018 11:07

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