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Effect of free-stream turbulence characteristics on boundary layer transition
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. (SGCE)ORCID iD: 0000-0002-3251-8328
2011 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The present measurement campaign on the free-stream turbulence inducedboundary layer transition scenario has provided a unique set of experimental data. This newset of data has the potential to enhance the understanding of the eect of the free-streamturbulence characteristic length scales on the transition location and not only the turbulenceintensity, which has been the focus in most previous studies. Recent investigations where theturbulence intensity has been kept essentially constant, while the integral length scale has beenchanged, show that the transition location is advanced for increasing length scale. The presentdata conrms previous results for low turbulence intensities, but shows the opposite behavior forhigh turbulence intensities, i.e. that the transition location is advanced for decreasing integrallength scales. Important to underline here is that the integral length scale has a relatively smallinuence on the transition location as compared to the turbulence intensity and data analysesare now directed towards enhanced understanding of how the dierent parts of the incomingenergy spectrum aects the energy growth inside the boundary layer.

Place, publisher, year, edition, pages
2011.
Series
Journal of Physics: Conference Series, ISSN 1742-6588 ; 318
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
URN: urn:nbn:se:kth:diva-87067DOI: 10.1088/1742-6596/318/3/032019ISI: 000301336300019Scopus ID: 2-s2.0-84856350129OAI: oai:DiVA.org:kth-87067DiVA: diva2:501346
Conference
EUROMECH, 13th European Turbulence Conference, Sept. 12-15, Warsaw
Note

QC 20120411

Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2012-08-29Bibliographically approved

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Fransson, Jens H. M.

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