Direct Numerical Simulation of Boundary Layer Transition in Streamwise Corner-Flow

The flow physics of inlet-fueled, low-compression scramjets

“…As the corner vortex, induced by shock boundary layer interaction at the start of the inlet (see Section 6.5), lifts off the inlet compression ramp, disturbances are introduced into the corner region, which grow through the existing corner instability mechanism. DNS simulation of streamwise corner flows show the development of coherent transitional structures, such as hair pin vortices [195]. WMLES is, however, not capable to accurately resolve the physical transition process in boundary layers, assuming it is not drastically over-resolved, which explains the development of merely small scale incoherent disturbances in the corner region.…”