Planar concentration and velocity measurements of a shock-accelerated gas curtain at multiple Mach numbers

Concentration and velocity measurements are obtained in a shock-accelerated gas curtain for three values of the incident shock strength: Ma = 1.2, 1.5, and 2.0. Qualitative PLIF images yield planar concentration maps at approximately 12 times to capture the evolution of the transitioning curtain, from which mixing widths are estimated as a function of time. The concentration results are complemented by planar velocity measurements (using combined PIV/PLIF) at one or two times for each Mach number. Vorticity and circulation estimates are computed from the PIV data and used in determining appropriate scaling of the flow.