Abstract: Aiming at the process of solid particles impacting the workpiece involved in hydrodynamic suspension polishing, the impact angle and velocity between particles and workpiece surface was studied with different working conditions.A threedimensional model of the hydrodynamic suspension polishing flow field was established by CFD and the velocity field during particles impacting the surface of workpiece was calculated. The experimental observations under different working conditions was carried out by PIV. The results indicate that the velocity distribution of solid particle calculated by CFD software are accord with the actual velocity distribution observed by PIV, and the PIV values are more affected by the impact effect between solid particles with the increase of rotation speed. The angle that solid particles impact workpiece is very small in hydrodynamic suspension polishing, which is similar to parallel friction on the workpiece surface, and the rotation speed of polishing disc and the concentration of polishing liquid have little influence on the impact angle.
Key words: hydrodynamic suspension polishing; impact angle; impact velocity; computational fluid dynamics(CFD); particle image velocimetry(PIV)