A study on the flow sturcture and cutting performance of submerged abrasive water jet

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Abrasive suspension water jet (ASJ) technology is characterized in efficient acceleration of particles compared to abrasive injection jet (AIJ). Concerned on the performance of ASJ, the relation of machining property of abrasive water suspension jet was clarified in this work with an emphasis on the surface treatment related to the jet flow structure, working conditions and cutting parameters.The main output of this research is the deepening of knowledge and practical experience in the field of high-speed water jets. International cooperation between the Nihon University and Institute of Geonics of the Czech Academy of Sciences has been established in the frame of practical research activities.The practical part was that extensive experiments were carried out at the Nihon University in Koriyama. Machined samples were measured on the digital microscope Keyence VHX-6000. Measurement of the topography of all examined samples was performed on a Micro Professional FRT optical profilometer. Research of the topography of the surface created by the various types of water jets provides information on the formation of the jet and its efficiency in underwater cutting. This data obtained is useful to optimize ASJ technology to produce the required surface topography of various materials. In particular, it is a search for a connection between the selected technological parameters and the topography of the resulting surface.