Abstract
This paper describes the generation of cavitation by pulsed water jetting and its capability for utilization. A submerged cavitating water jet (SCAWJ) was realized by a system that we developed. In this study, we visualized the cavitating water-jet in water pool by laser-sheet imaging technique. And to evaluate the capability for surface treatment of metal by impinging SCAWJ, the impulse force of SCAWJ and the eroded depth and area of metal by SCAWJ were measured. From the experimental result, it was found that the present pulsed SCAWJ system have a capability for shotless-peening of metal surface at longer stand-off distance by means of strong impulse force derived from collapse of cavity generated by cavitating jet.
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