Micro vortex generator control of axisymmetric high-speed laminar boundary layer separation

Reattachment heating upstream of short compression ramps in hypersonic flow

“…The dominant influence of the flow at the top edge of the obstacle is proven to be inherent to obstacle heights of order of the boundary layer thickness or shorter, whereby the location of reattachment is fixed close ahead of the edge and where the subsequent relaxation region must compensate for the abrupt expansion at the obstacle's height through increased separation extent. Besides the implications on the local heating augmentation, the strong sensitivity of the separation bubble to the flow near the top leading edge region is expected to also play a key role in roughnessinduced transition and micro-vortex generator control problems (Fiala et al 2014;Estruch-Samper et al 2015), where local interference effects can have a major downstream influence.…”

Supersonic flow control

“…Another experimental study on MVGs focuses on the effects of MVG height and configuration in controlling a flare induced laminar SWBLI [40]. The results were facilitated by time-resolved streamwise surface heat transfer measurements and high-speed schlieren imaging.…”

Performance evaluation of different micro vortex generators in controlling a flare-induced shock–boundary layer interaction

“…64,65 Performance of these vortex generators is governed by different factors, and it goes without saying that maximum benefit can be achieved by identifying and deploying the optimum configuration. Larger devices produce greater wave drag 66 and could themselves induce strong local SBLIs, 67 which could be counterproductive. Hence, these devices are restricted to sub-boundary layer heights and are often termed as micro vortex generators (MVGs).…”