Measurements of a re-shocked heavy-gas curtain using PLIF

We investigate Richtmyer-Meshkov instability developing in a heavy-gas curtain. The SF6 curtain is accelerated by a planar, Mach 1.2 shock, and then re-shocked by the nominally planar reflection from the end of the tube. We obtain preliminary concentration measurements of the transitioning heavy gas using acetone-based planar laser-induced fluorescence (PLIF). High-resolution images are acquired before and after re-shock.