shadow graph movie 2
Shadowgraph movie of e-beam heated flow made from 32 images taken 35 miocroseconds apart with an exposure of 3.5 microseconds. The electron beam irradiates flow for 750 microseconds and approximately 90 kW enters the nozzle. Flow is from the bottom to top of page and the Mach angle of the shock wave created by a small cone is observed to increase with the increase in Mach number. The Mach number decreases from 3.9 to 2.4. The non-uniform change in Mach angle across the flow is due to the finite size of the e-beam that is not centered in the nozzle.