Abstract
Relationship between the condition of the high pressure water jet and the produced powder was investigated to understand the mechanism of fine powder production by high pressure water atomization. The water flow rate and the slit width of water nozzle were directly measured in three different initially set nozzle configurations under various water pressures (up to 80MPa). Also, the suction pressure above the conical water jet and the staticpressure difference of the jet interior were investigated.
The water flow rate and the configuration of the water nozzle increased comparably as the water pressure increased, but the suction pressure formed a peak. The shape and size of powders change up to the value of water pressure where the peak suction pressure appeared. The characterization of powders did not change considerably when atomized in the water pressure which exceed the value of Peak suction pressure.
