Vortex generator

Evaluation of Ramp-Type Micro Vortex Generators Using Swirl Center Tracking


The evolution of the primary vortex pair downstream of micro vortex generators placed in a supersonic stream is compared using a swirl center tracking technique, for standard, slotted, and split-ramp-type vortex generators. Evolution of vortex strength, determined using circulation, and distribution of vortices, determined using contours of helicity, are also compared. Results show that secondary vortices emerge stronger, and liftoff heights drop, with the introduction of slot (slotted micro vortex generator) or gaps (split-ramp micro vortex generator). Results also shows that the split-ramp device results in the most energetic near-surface flow but the worst outgoing boundary-layer integral properties, whereas the slotted-ramp devices with taper fare well on both counts.


  1. Sandhu, J.P.S., Ghosh, S., Subramanian, S. and Sharma, P., "Evaluation of Ramp-Type Micro Vortex Generators Using Swirl Center Tracking," AIAA Journal, 56(9), 2018, pp.3449-3459.https://doi.org/10.2514/1.J056796.

  2. Sandhu, J.P.S., Subramanian, S., Ghosh, S. and Sharma, P., 2016. Evaluation of Some Wedge-shaped Vortex Generators Using Swirl Center Tracking, AIAA paper, 2016-4086.https://doi.org/10.2514/6.2016-4086.

Effectiveness of micro-vortex generators in tandem in high-speed flows


Micro-vortex generators offer an alternative to boundary-layer bleed and suction to prevent flow separation due to shock boundary-layer interaction. While the effects of single vortex generators have been studied extensively, their effectiveness in a combination hasn’t been looked into in much detail. This is an attempt to optimise a configuration of two micro-vortex generators by changing the distance between them. Simple, slotted and ramped-vane devices are investigated in this work.


  1. Sajeev, Shilpa, Jatinder Pal Singh Sandhu, Santanu Ghosh, and Jack R. Edwards. "Effectiveness of micro-vortex generators in tandem in high-speed flows," AIAA paper, 2020-2961. https://arc.aiaa.org/doi/abs/10.2514/6.2020-2961