Study on shock wave-vortex ring interaction by the micro vortex generator controlled ramp flow with turbulent inflow

In this study, we will investigate the interaction between the vortex rings and oblique shocks generated by the micro vortex generatorʼs (MVG) controlled ramp flow at M=2.5M=2.5 and Reθ=5760Reθ=5760. An implicit large eddy simulation method is used by solving the unfiltered form of the Navier–Stokes equations with the 5th order bandwidth-optimized WENO scheme. It shows that the vortex ring structure generated by MVG is very stable, it does not break down and it keeps its original topology after penetrating the strong shock wave. However, the oblique shocks are broken when they interact with vortex rings. The bump on the 3D shock wave surface is observed and its mechanism is explained. The separation zone, which is originally generated by the shock–boundary layer interaction, is significantly reduced due to the vortex ring–shock interaction.