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Transitional boundary layers caused by free-stream turbulence
KTH, School of Engineering Sciences (SCI), Mechanics.
2011 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

The present measurement campaign on the free-stream turbulence (FST) induced boundary layer transition scenario has provided a unique set of experimental data, with potential to enhance the understanding of the eect of the free-stream turbulence characteristic length scales on the transition location and not only the turbulence intensity, which has been the focus in most previous studies. Recent investigations where the turbulence intensity has been kept essentially constant, while the integral length scale has been changed, show that the transition location is advanced for increasing length scale. However, the present data show that the integral and Taylor length scales of the FST have a relatively small inuence on the transition location as compared to the turbulence intensity and data analyses are now directed towards enhanced understanding of how the dierent parts of the incoming energy spectrum aects the energy growth inside the boundary layer.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology , 2011. , viii, 77 p.
Series
Trita-MEK, ISSN 0348-467X ; 2011:06
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-34150ISBN: 978917501-035-9OAI: oai:DiVA.org:kth-34150DiVA: diva2:419387
Presentation
2011-06-09, Sal S40, KTH, Teknikringen 8, Stockholm, 13:15
Opponent
Supervisors
Note
QC 20110526Available from: 2011-05-26 Created: 2011-05-26 Last updated: 2013-05-02Bibliographically approved

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Shahinfar, Shahab
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