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Transition to turbulence delay using miniature vortex generators – AFRODITE –
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-3251-8328
KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics.ORCID iD: 0000-0003-3310-0633
2014 (English)In: Springer Proceedings in Physics, Springer, 2014, 71-74 p.Conference paper (Refereed)Text
Abstract [en]

A laminar boundary layer has a relatively low skin-friction drag coefficient (cf) with respect to a turbulent one, and for increasing Reynolds number the difference in cf rapidly increases, and the difference can easily amount to an order of magnitude in many industrial applications. This explains why there is a tremendous interest in being able to delay transition to turbulence, particularly by means of a passive mechanism, which has the advantage of accomplishing the control without adding any extra energy into the system. Moreover, a passive, control does not have to rely on typically complicated sensitive electronics in sensor-actuator systems. Within the AFRODITE project [3] we now present the first experimental results where we are able to show that miniature vortex generators (MVGs) are really coveted devices in obtaining transition delay.

Place, publisher, year, edition, pages
Springer, 2014. 71-74 p.
Keyword [en]
Boundary layers, Laminar boundary layer, Reynolds number, Skin friction, Turbulence, Vortex flow, Passive mechanism, Sensitive electronics, Sensor actuators, Skin-friction drag, Transition delays, Transition to turbulence, Vortex generators, Atmospheric thermodynamics
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-181669DOI: 10.1007/978-3-319-01860-7_12ScopusID: 2-s2.0-84943258119ISBN: 9783319018591OAI: oai:DiVA.org:kth-181669DiVA: diva2:903715
Conference
5th iTi Conference in Turbulence, 2012, 25 April 2012 through 25 April 2012
Note

QC 20160216

Available from: 2016-02-16 Created: 2016-02-02 Last updated: 2016-02-16Bibliographically approved

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Fransson, Jens H. M.Shahinfar, ShahabSattarzadeh, Sohrab Shirvan
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