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High-resolution nonlinear nonlocal instability analysis of crossflow-dominated transition scenarios

Hein, Stefan (2005) High-resolution nonlinear nonlocal instability analysis of crossflow-dominated transition scenarios. STAB-Workshop, 2005-11-08 - 2005-11-11, Göttingen.

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Abstract

Crossflow-dominated laminar-turbulent transition in three-dimensional boundary layers is studied by nonlinear parabolized stability equations (PSE). It is demonstrated that the strongly nonlinear stages of the transition process, i.e. the formation of high-frequency secondary instabilities, their linear and nonlinear growth as well as the subsequent disintegration of the secondary disturbance structures which is accompanied by a degradation of the stationary crossflow vortices can be modelled by this type approach provided that sufficiently high resolution in modal space is used.

Document Type:Conference or Workshop Item (Speech)
Title:High-resolution nonlinear nonlocal instability analysis of crossflow-dominated transition scenarios
Authors:
AuthorsInstitution or Email of Authors
Hein, StefanUNSPECIFIED
Date:2005
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:crossflow-dominated transition, secondary instability, NOLOT/PSE
Event Title:STAB-Workshop
Event Location:Göttingen
Event Type:national Conference
Event Dates:2005-11-08 - 2005-11-11
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L -- no assignement
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Deposited By: Elisabeth Winkels
Deposited On:26 Jan 2006
Last Modified:27 Apr 2009 04:57

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