Material removal characteristics analysis of rectangular high-speed flow field in fluid jet polishing
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摘要: 为了提高射流抛光的加工效率，设计了一种矩形喷嘴结构，基于并行去除方式来提高工件的去除效率。根据流体力学基本理论，分析了矩形喷嘴冲击射流流场的结构特性，并对其流场分布进行了定量计算。基于射流去除理论，建立了矩形喷嘴的材料去除理论模型，并对去除量分布进行了计算与比较。详细分析了矩形喷嘴结构参数与去除量之间的关系，在此基础上对矩形喷嘴进行了优化，结果表明，矩形喷嘴长宽比控制在10左右能够得到很好的去除效果。Abstract: 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.
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Key words:
- fluent jet /
- rectangle-nozzle /
- high-speed flow field /
- length-width ratio /
- removal rate
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