On the robustness of separation control by streamwise vortices
2010 (English)In: European journal of mechanics. B, Fluids, ISSN 0997-7546, E-ISSN 1873-7390, Vol. 29, no 1, 9-17 p.Article in journal (Refereed) Published
The robustness of vane-type vortex generators (VGs) for separation flow control was studied in a separating turbulent boundary layer on a flat plate. VG arrays of different sizes and streamwise positions were positioned upstream of the separation bubble and their effect on the flow field was studied with the help of particle image velocimetry (PIV). The extent of the separated region was varied by changing the pressure gradient. Three different separation bubbles were produced and their extent was approximately doubled for each increase in pressure gradient. It was found that the sensitivity of the control effect to changes in the size of the separation bubble is small within the applied range of pressure gradients. Furthermore, the importance of the relative position of the VGs with respect to the separated region is small.
Place, publisher, year, edition, pages
2010. Vol. 29, no 1, 9-17 p.
Adverse pressure gradient; Turbulent boundary layer; Flow separation; Flow control; Vortex generators
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-9837DOI: 10.1016/j.euromechflu.2009.09.001ISI: 000272928900002ScopusID: 2-s2.0-71649098287OAI: oai:DiVA.org:kth-9837DiVA: diva2:133521
QC 20100825. Uppdaterad från manuskript till artikel (20100825). Ola Lögdberg acknowledges Scania CV for the opportunity to carry out his
doctoral work at KTH Mechanics within the Linné Flow Centre.2009-01-122009-01-122011-01-25Bibliographically approved