  In this study, we investigate the interaction between vortex rings behind MVG
and the oblique shocks in the MVG controlled ramp flow at M=2.5 and Req=5760.
Implicit large eddy simulation (ILES) method is used by solving the unfiltered
form of the Navier-Stokes equations with the 5th order Bandwidth-optimized WENO
scheme. The fully developed inflow is given by a series of turbulent profiles
obtained from previous DNS simulation. It shows that the ring structure does
not break down and keeps its topology after penetrating the strong shock wave
and the oblique shocks is influenced a lot by the induced flow field from
rings. The bump of the 3D shock wave surface is discovered and its mechanism is
explained.
