Supersonic Impulse Jet of Water Issuing from Taper Nozzle into Atmosphere

A piston impact against a water column charged in a taper nozzle can produce a high-speed pulse water jet. In this paper, we analyze the high-speed pulse water jet with 500[m/s] class in the atmosphere, using CIP method. To verify the computational model, jet photograph by colored Schlieren method and moving pictures taken by high-speed video camera are compared with the numerical results. Consequently, collision and break up of jets as well as complicated shock waves around jet are comparatively simulated.