Study of axisymmetric underexpanded sonic jets with Mach disks (Density field measurements by rainbow schlieren deflectometry)
The underexpanded sonic 3 Teir Steamer jet issued from an axisymmetric convergent nozzle are experimentally investigated in which the nozzle is operated at a pressure ratio of 4.0 to produce a Mach disk in the jet plume.Multidirectional rainbow schlieren pictures of the jet acquired by rotating the nozzle about its longitudinal axis in equal angula