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Linear control of 3D disturbances on a flat-plate
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control.ORCID iD: 0000-0002-8209-1449
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-4346-4732
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control.ORCID iD: 0000-0001-7864-3071
2010 (English)In: SEVENTH IUTAM SYMPOSIUM ON LAMINAR-TURBULENT TRANSITION / [ed] Schlatter P; Henningson DS, 2010, Vol. 18, 373-378 p.Conference paper, Published paper (Refereed)
Abstract [en]

Using a number of localized sensors and actuators, a feedback controller is designed in order to reduce the growth of three-dimensional disturbances in the hotplate boundary layer. A reduced-order model of the input-output system (composed of the linearized Navier-Stokes equations including inputs and outputs) is computed by projection onto a number of balanced truncation modes. It is shown that a model with 50 deuces of freedom captures the input-output behavior of the high-dimensional (n similar to 10(7)) system. The controller is based on a classical LQG scheme with a row of three sensors in the spanwise direction connected to a row of three actuators further downstream. The controller minimizes the perturbation energy in a spatial region defined by a number of (objective) functions.

Place, publisher, year, edition, pages
2010. Vol. 18, 373-378 p.
Series
IUTAM Bookseries, 18
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-29871DOI: 10.1007/978-90-481-3723-7_60ISI: 000277097200060Scopus ID: 2-s2.0-79959225838ISBN: 978-90-481-3722-0 (print)OAI: oai:DiVA.org:kth-29871DiVA: diva2:399177
Conference
7th IUTAM Symposium on Laminar-Turbulent Transition, Royal Inst Technol, Stockholm, SWEDEN, JUN 23-26, 2009
Note
QC 20110221Available from: 2011-02-21 Created: 2011-02-17 Last updated: 2011-02-21Bibliographically approved

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Bagheri, ShervinBrandt, LucaHenningson, Dan S.

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