​miniature Vortex generator for flow control

Miniature Vortex Generators (MVGs) typically consist of pairs of triangular or rectangular blades mounted vertically on a wall and arranged in a spanwise array direction. Such devices have been commonly observed on aircraft wings, marine propulsion systems and automotive vehicles to introduce streamwise vortices of alternating low and high speeds, re-energizing the near-wall flow to avoid separation  

AIM
To use MGVs in energising the near wall flow and to find method to predict skin friction drag that is influenced by MGVs.

METHOD
The experiments are performed in a closed-loop boundary layer wind tunnel at the University of Adelaide, where the velocity measurements were taken by using hot-wire anemometry (HWA). The experimental measurements utilized a rectangular vane-type MVG placed in a ‘V’ shape at the upstream location.

RESULTS

​J. Kong, B. Nugroho, L. G Bennets, C. Chan R. C. Chin (2023) Friction Velocity Determination Techniques in Turbulent Boundary Layers with Miniature Vortex Generators. Exp in Fluids. 65:76
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Experiment figures