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The effect of oblique waves on jet turbulence
Dept. of Mechanical and Aerospace Engineering (DIEM), University of Bologna.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
Dept. of Mechanical and Aerospace Engineering (DIEM), University of Bologna.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2009 (English)In: Progress in Turbulence III, 2009, p. 231-234Conference paper, Published paper (Refereed)
Abstract [en]

A turbulent jet with azimuthal forcing has been investigated for different velocities, excitation amplitudes and frequencies by means of hot-wire anemometry. A turbulence reduction was observed when the frequency was close to the shear layer mode frequency. Conditionally sampling analysis has been applied in order to evince some details of the structures embedded in the flow. It seems that the excitation increases the production of turbulence by means of non-linear interaction and then saturates after the first diameter with a faster decay of all the modes but the subharmonic.

Place, publisher, year, edition, pages
2009. p. 231-234
Series
Springer Proceedings in Physics, ISSN 0930-8989
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-83157DOI: 10.1007/978-3-642-02225-8_56ISI: 000283758200056Scopus ID: 2-s2.0-85034628983OAI: oai:DiVA.org:kth-83157DiVA, id: diva2:498751
Conference
Proceedings of the iTi Conference in Turbulence 2008. Bertinoro, ITALY. OCT 12-15, 2008
Note

QC 20120213

Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2018-02-14Bibliographically approved

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Segalini, AntonioÖrlü, RamisAlfredsson, P. Henrik

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