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Optimal suction design for hybrid laminar flow control
Swedish Defence Research Agency, FOI, Aeronautics Division, FFA, SE-172 90 Stockholm, Sweden.ORCID iD: 0000-0002-5913-5431
2006 (English)In: Sixth IUTAM Symposium on Laminar-Turbulent Transition / [ed] R. Govindarajan, Springer, 2006, 201-206 p.Conference paper (Refereed)
Abstract [en]

We present a theory for computing the optimal steady suction distribution in order to minimize the growth of convectively unstable disturbances, and thus delay laminar-turbulent transition on swept wings. Here, we use the optimal control theory and minimize an objective function based on a sum of the kinetic energy of an arbitrary number of disturbances. The optimization procedure is gradient-based where the gradients are obtained using the adjoint of the parabolized stability equations and the adjoint of the boundary layer equations. Results are presented for an air foil designed for medium range commercial air crafts.

Place, publisher, year, edition, pages
Springer, 2006. 201-206 p.
, Fluid Mechanics and Its Applications, ISSN 0926-5112 ; 78
Keyword [en]
HLFC, flow control, optimal suction, Tollmien-Schlichting, PSE, adjoint
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-94100DOI: 10.1007/1-4020-4159-4_25ISI: 000236905600025ISBN: 978-140203459-6OAI: diva2:525306
Sixth IUTAM Symposium on Laminar-Turbulent Transition, Bangalore, India, December, 13-7, 2004
QC 20120815Available from: 2012-05-07 Created: 2012-05-07 Last updated: 2012-08-15Bibliographically approved

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Hanifi, Ardeshir
Fluid Mechanics and Acoustics

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ReferencesLink to record
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