Relationship Between Intermittent Separation and Vortex Structure in a Three-Dimensional Shock/Boundary-Layer Interaction

Turbulence characteristics of supersonic corner flows in a low aspect ratio rectangular channel

“…The aim of this work is to study supersonic turbulent corner flows that would exist in the air intake of a supersonic aircraft and attempt to understand the structure and the driving properties of the flow. As is evident from previous research on shock-boundary layer interactions [2,3], strong incipient separation is fairly a common place in such type of flows. These incipient separation bubbles are primarily caused by the interaction of spatially unsteady structures which are a result of unsteady flowfields.…”

“…This design was selected to produce an equilibrium flat plate boundary layer [19] in an attempt to minimize pressure gradients history effects and Görtler vortices on the boundary layer developing on the bottom-wall (floor) of the wind tunnel. Since our previous work has focused on a 3D SBLI configuration and this work is an effort to better understand it, we use the same coordinate system of our previous SBLI work [3,20,21,22]. In particular, the origin of the coordinate system is centered at the location of the leading edge of the full-span 6 o shock generator wedge (which is about 481.5mm downstream of the nozzle throat) used in our previous work on 3D SBLI.…”

“…Measurements on transverse vertical (TV) planes are performed on the lower right corner (as one looks downstream) of the duct cross-section at three streamwise direction: (TV1) -100 mm, (TV2) -50 mm and (TV3) 75 mm with respect to the location where we have positioned the leading edge of a shock generator in our previous work [27,3].…”

Swept shock corner flow interacions

“…These unit physics problems have been considered in isolation in many previous studies [9,10,11,12,13,14]. Threedimensional interactions has been discussed by Helmer et al [15], Eagle [16], Humble et al [17] and Morajkar et al [6,8]. During our previous studies of 3D SBLIs [6,8], we found that the vortex induced by the swept shock may interact with the secondary corner flow causing strong incipient flow separations, which in turn, can affect the primary flow.…”

“…In the current study a set of high-resolution quantitative velocity measurements in the region of the interaction between the swept shock and the corner flow is considered. These measure will enable us to identify the flow structure and to identify the mechanisms responsible for the strong incipient flow separation observed in this region [6,8].…”