Phantom v2511 Ultrahigh-Speed Camera - Capturing pressure changes with Schlieren imaging .

This ultrahigh-speed sequence shows the liftoff of a pressurized PET drink bottle from a toy rocket launcher. Captured by the v2511 Ultrahigh-speed camera, these “Mach discs“ or “Mach diamonds“ emerge as the flow reaches under-expanded supersonic flow from the nozzle. These objects are the result of standing shockwaves caused by abrupt pressure changes. The direction-indicating color Schlieren technique used visualizes the density gradients produced. Winner of the “Excellent Slow Motion Award” at ICHSIP 31 in Osaka, Japan, this experiment was conducted by Mr. Phred Petersen, RMIT University, Melbourne, VIC with the assistance of Phil Taylor, Phantom Camera Field Applications Engineer. Captured rate: 50,000 fps and slowed for viewing by a factor of 2,000. Exposure: 1µs.