Material removal characteristics analysis of rectangular high-speed flow field in fluid jet polishing

In order to improve the efficiency of fluid jet polishing (FJP), the rectangle-nozzle structure was proposed to improve the removal efficiency in parallel. According to principles of fluid dynamics, the flow field characteristic of rectangle-nozzle structure was analyzed theoretically and the flow field distribution was calculated. Based on jet removal theory, the theoretical material removal models of rectangle-nozzle model were established, and removal distributions were calculated and compared. The relationship between rectangle-nozzle structure parameters and removal was analyzed in detail. Based on above results, the rectangle-nozzle was optimized. The results show that when the rectangle-nozzle length-width ratio be controlled to 10 or so can obtain better removal effect.