to simulate airflow around cone-shaped geometries at Mach 16. What they found stunned them: symmetrical expectations gave way to angular instabilities, wavy separation lines, and flow breaks.

FRS images were then taken in the Princeton Mach 8 facility. The second model is a 0.2416 m 4:1 elliptic cone with 17.5 degree half-angle on the major axis. FRS images were also taken on a flat plate ...