为了研究水辅助激光加工靶材上方水层流动的特性, 采用流体动力学分析软件FLUENT, 对3种不同结构的水辅助激光加工的水流装置进行建模仿真, 分析了靶材上方流体的速度场, 并对结果进行对比分析。结果表明, 由垂直于靶材上方的速度位置图的分析可知, 装置结构的差异使得流场也具有差异性; 靶材上方1cm以内位置, 流体速度平稳, 有利于传输激光, 排出熔渣和放置加工材料。这对选择水辅助激光加工构建控制水层流动的装置提供了理论依据。

In order to study the water flow characteristics of target layer during the water assisted laser processing, fluid dynamics analysis software FLUENT was used to do the model and simulation of three different flow devices for water assisted laser processing. The velocity field of fluid above target material was analyzed and the results were analyzed in contrast. The results show that, flow field has difference with the difference of device structure based on the analysis of speed-position curves perpendicular to target material. The fluid speed is smooth within the position of less than 1cm above target. The position is good for laser transmission, slag discharge and processing material placement. The study provides a theory basis for building water flow control device of water assisted laser processing.