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A new experimental setup for studies on wake flow instability and its control
KTH, School of Engineering Sciences (SCI), Mechanics.
2009 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

 A new experimental setup for studies on wake flow instability and its control, which has been designed and manufactured, is introduced and described. The main body is a dual-sided flat plate with an elliptic leading edge and a blunt trailing edge. Permeable surfaces enable boundary layer suction and/or blowing that introduce the feature of adjusting the inlet condition of the wake created behind the plate. This, in combination with a trailing edge that is easily modified, makes it an ideal experiment for studies of different control methods for the wake flow instability. Additionally, a vortex detection program have been developed in order to detect, analyse and compare small-scale vortical structures in the wake behind the plate for different inlet conditions and control methods applied to the wake flow. Instantaneous velocity fields behind a cylinder subjected to suction or blowing through the entire cylinder surface have been analysed with this program. The results of the analysis show that the major change for different levels of blowing or suction is the location of vortices while the most common vortex size and strength are essentially unchanged.

Place, publisher, year, edition, pages
Stockholm: Universitetsservice US-AB , 2009. , vi, 38 p.
Series
Trita-MEK, ISSN 0348-467X ; 2009:05
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-10394ISBN: 978-91-7415-298-2 (print)OAI: oai:DiVA.org:kth-10394DiVA: diva2:216613
Presentation
2009-05-06, E51, KTH, Osquars backe 14, Stockholm, 10:15 (English)
Opponent
Supervisors
Available from: 2009-05-13 Created: 2009-05-11 Last updated: 2010-10-18Bibliographically approved
List of papers
1. Vortex analysis in the near wake behind a porous cylinder subject to blowing or suction
Open this publication in new window or tab >>Vortex analysis in the near wake behind a porous cylinder subject to blowing or suction
2008 (English)Conference paper, Published paper (Refereed)
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-25310 (URN)
Conference
7th European Fluid Mechanics Conference, 14-18 Sept. 2008, Manchester, Great Britain.
Note
QC 20101018Available from: 2010-10-18 Created: 2010-10-18 Last updated: 2010-10-18Bibliographically approved
2. On the vortex generation behind a passive V-shaped mixer in a pipe flow
Open this publication in new window or tab >>On the vortex generation behind a passive V-shaped mixer in a pipe flow
2008 (English)In: Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference 2008, 2008Conference paper, Published paper (Refereed)
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-25311 (URN)
Conference
14th AIAA/CEAS Aeroacoustics Conference, 5-7 May 2008, Vancouver, Canada
Note
QC 20101018Available from: 2010-10-18 Created: 2010-10-18 Last updated: 2011-11-08Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf