Stability analysis and control design of spatially developing flows
2008 (English)Licentiate thesis, comprehensive summary (Other scientific)
Methods in hydrodynamic stability, systems and control theory are applied to spatially developing flows, where the flow is not required to vary slowly in the streamwise direction. A substantial part of the thesis presents a theoretical framework for the stability analysis, input-output behavior, model reduction and control design for fluid dynamical systems using examples on the linear complex Ginzburg-Landau equation. The framework is then applied to high dimensional systems arising from the discretized Navier–Stokes equations. In particular, global stability analysis of the three-dimensional jet in cross flow and control design of two-dimensional disturbances in the flat-plate boundary layer are performed. Finally, a parametric study of the passive control of two-dimensional disturbances in a flat-plate boundary layer using streamwise streaks is presented.
Place, publisher, year, edition, pages
Stockholm: KTH , 2008. , vii, 15 p.
Trita-MEK, ISSN 0348-467X ; 2008:04
Global modes, transient growth, model reduction, feedback control
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-4769OAI: oai:DiVA.org:kth-4769DiVA: diva2:13846
2008-05-06, D41, D, Lindstedsvägen 17, Stockholm, 14:00 (English)
Berggren, Martin, Professor
QC 201011032008-05-232008-05-232010-11-03Bibliographically approved
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