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Experimental study on the use of the wake instability as a passive control in coaxial jet flows
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-8667-0520
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1663-3553
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2010 (English)In: Seventh IUTAM Symposium on Laminar-Turbulent Transition, 2010, 361-366 p.Conference paper, Published paper (Refereed)
Abstract [en]

The present paper verifies experimentally the theoretical result by Talamelli and Gavarini (Flow, Turbul. & Combust., 2006), who proposed that the wake behind the separation wall between the two streams of a coaxial jet creates the condition for an absolute instability. This absolute instability, by means of the induced vortex shedding, provides a continuous forcing mechanism for the control of the flow field. The potential of the found control mechanism as well as its robustness has been verified and its ability to enhance the turbulence intensity within the inner and outer shear layer has been demonstrated.

Place, publisher, year, edition, pages
2010. 361-366 p.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-83152DOI: 10.1007/978-90-481-3723-7_58ISI: 000277097200058Scopus ID: 2-s2.0-78649865444ISBN: 978-90-481-3722-0 (print)OAI: oai:DiVA.org:kth-83152DiVA: diva2:498745
Conference
7th IUTAM Symposium on Laminar-Turbulent Transition. Royal Inst Technol, Stockholm, SWEDEN. JUN 23-26, 2009
Note
QC 20120213Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2012-02-13Bibliographically approved

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Segalini, AntonioÖrlü, RamisAlfredsson, P. Henrik

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