Vortex Generator Induced Flow in a High Re Boundary Layer

Clara Marika Velte, C. Braud, S. Coudert, J.-M. Foucaut

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Abstract

Stereoscopic Particle Image Velocimetry measurements have been conducted in cross-planes behind three different geometries of Vortex Generators (VGs) in a high Reynolds number boundary layer. The VGs have been mounted in a cascade producing counter-rotating vortices and the downstream flow development was examined. Three VG geometries were investigated: rectangular, triangular and cambered. The various VG geometries tested are seen to produce different impacts on the boundary layer flow. Helical symmetry of the generated vortices is confirmed for all investigated VG geometries in this high Reynolds number boundary layer. From the parameters resulting from this analysis, it is observed at the most upstream measurement position that the rectangular and triangular VGs produce vortices of similar size, strength and velocity induction whilst the cambered VGs produce smaller and weaker vortices. Studying the downstream development in the ensemble and spanwise averaged measurements, it is observed that the impact from the rectangular and triangular VGs differs. For the rectangular VGs, self-similarity in the streamwise component was confirmed.
Original languageEnglish
Title of host publicationProceedings of Torque 2012, The science of making torque from wind
Number of pages10
Publication date2012
Publication statusPublished - 2012
EventThe science of Making Torque from Wind 2012: 4th scientific conference - Universität Oldenburg, Oldenburg, Germany
Duration: 9 Oct 201211 Oct 2012
http://www.forwind.de/makingtorque/Home.html

Conference

ConferenceThe science of Making Torque from Wind 2012
LocationUniversität Oldenburg
Country/TerritoryGermany
CityOldenburg
Period09/10/201211/10/2012
Internet address

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