Microramp Control of Supersonic Oblique Shock-Wave/Boundary-Layer Interactions

Decay of the supersonic turbulent wakes from micro-ramps

“…The streamwise and wall-normal coordinates are expressed in non-dimensional units using the ramp height as scaling length, following the study of Babinsky et al [8], where the deficit loci from various micro ramps collapsed to a single curve. The decay of the streamwise and wall-normal velocity components are addressed first.…”

“…Babinsky et al [8] identified a primary vortex pair dominating the mean flow and multiple secondary vortices of weaker strength. From the unsteady behavior of the wake, the clearest feature emerging from both experiments and simulations is the vortex shedding from the quasi-circular free shear layer emanating from the ramp trailing edge.…”

“…A Reynolds-averaged Navier-Stokes (RANS) simulation with immersed-boundary treatment was performed by Ghosh et al [12] (Ma=2.5, h/δ=0.46, 0.92) and the velocity profiles were compared with experiment data [8]. An acceptable agreement was only achieved for the larger micro-ramp (h/δ=0.92).…”

“…Much emphasis was placed on the description of the development of the MVG wake. Among them, Babinsky et al [8] measured the cross-flow planes at three positions downstream of micro-ramps of various heights. The momentum deficit was visualized and its decay was also observed.…”

“…A number of baseline experimental studies have been carried out to investigate the effectiveness of MVGs towards SWBLI involving oblique or normal shock waves [7][8][9] and positive effects were confirmed.…”