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

与磨料喷射技术(AIJ)相比，磨料悬浮水射流(ASJ)技术具有颗粒加速效率高的特点。从ASJ的性能出发，阐明了磨料水悬浮射流加工性能的关系，重点研究了与射流结构、工作条件和切割参数有关的表面处理，加深了对高速水射流领域的认识和实践经验。日本大学与捷克科学院地球物理研究所在实践研究活动的框架内建立了国际合作关系。实践部分是在郡山的日本大学进行了广泛的实验。加工后的样品在Keyence VHX-6000数字显微镜上进行测量。在Micro Professional FRT光学轮廓仪上测量所有受检样品的表面形貌。研究各种类型的水射流所产生的表面形貌，可提供有关水射流的形成及其在水下切割中的效率的信息。获得的数据有助于优化ASJ工艺，以生产各种材料所需的表面形貌。特别是，它是对所选择的技术参数和所得到的表面的形貌之间的联系的探索。

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.