Abstract
Recently conducted time-resolved studies of the interaction of a shock wave with a cylindrical cavity have added significantly to the understanding of shock wave reflection and focusing phenomena. Three major interaction issues are highlighted; firstly the reflection of waves off curved surfaces, secondly the details of shock focusing, and lastly the development of interesting shear layer flows, including jet formation and shear layer instabilities. Clarification of many of the processes is obtained by the tracking of weak perturbations generated from small steps on the surface of the cavity. In this paper the findings found for a circular reflector are highlighted and contrasted with those for parabolic surfaces.
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