At 260 MPa, a high-pressure waterjet are investigated by utilizing phase Doppler anemometry(PDA) technique. The sectional distributions of average velocity and root-mean-square velocityin the jet stream are acquired and discussed. Jet-cutting experiment is conducted with Ti6Al4Vplates serving as the target samples. Stand-off distance (SOD) and the relative angle between jetdirection and target surface are emphasized. The morphological characteristics on the cutsurfaces are visualized by utilizing a scanning electron microscope (SEM) and an opticalprofiling instrument. It is proved that the high-velocity jet core plays a significant role in termsof the energy concentration and velocity magnitude. The behavior of the abrasive particles isinevitably affected by the surrounding water. The grooves of diverse profiles on the cut surfaceare highly associated with the radial expansion of the jet stream when the jet developsdownstream. Furthermore, the complicated abrasive particle’s behavior is one of the decisivefactors affecting the roughness of the cut surface. The results also indicate that there exists anoptimal position of inclined sample plate corresponding to the combination of operationparameters in this experiment.
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