Abstract
The motion characteristics of particles play important roles on the quality and efficiency in abrasive water jet machining. In this paper, the abrasive water jet flow field is simulated by computational fluid dynamics (CFD). It is found that when the jet is continuous, there will form a static pressure zone on the surface of the workpiece, where pressure is high and fluid velocity is low. As the existence of static pressure zone, the velocity and motion direction of particles will be changed. Particles with different diameters and densities are compared when they are piercing through the static pressure zone. It can be found that in particles with greater diameter, the motion direction will be hard to be changed and the impact velocity will be higher. Particles with higher density, the motion direction will be also hard to be changed and the impact velocity will be higher. The influence of the radial position has also been considered. Closer to the jet axis, the impact velocity will be higher and the change quantity of motion direction will be smaller. It also can be seen that with the increasing of diameter or density, the influence of radial position on motion direction and impact velocity decreases.
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Zhang, X., Zhou, C., Jiang, L. et al. Influence of process parameters on abrasive particle motion characteristics in abrasive water jet descaling. Int J Adv Manuf Technol 90, 2741–2749 (2017). https://doi.org/10.1007/s00170-016-9564-6
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DOI: https://doi.org/10.1007/s00170-016-9564-6