An experimental analysis of oblique shock reflection over a two-dimensional multi-guttered wedge

Abstract

The oblique shock reflection over a multi-guttered model wedge is investigated at constant Mach number. The experimental parameters were the reflecting wedge angle and the depth of the gutter. It is found that, unlike the case of a smooth surface, the wave structure is not self-similar but similar with respect to the coordinate system made dimensionless by the depth when the wedges are geometrically similar (regardless of Reynolds number based on the depth). Again, unlike the smooth surface, the wave structure is essentially unsteady, and the entire body of waves reflected from the bottom of the gutters play a key role in the configuration of a precursory reflected wave as well as in the behavior of the triple point. The slope of the triple point trajectory suggests that it approaches asymptotically that for a smooth surface.