冲击角度对射流抛光中材料去除面形的影响分析

Influence Analysis of Impact Angle on Material Removal Profile in Fluid Jet Polishing

冲击角度会影响冲击射流的动力特性,对射流抛光的材料去除面形和去除量大小有重要的影响。利用计算流体动力学理论进行了冲击角度对射流抛光中材料磨蚀的影响的仿真和实验研究,分析了冲击角度对冲击射流特性的影响,结合实验研究,基于射流厚度、壁面速度和压力等几个方面分析了冲击角度对材料去除面形的影响,得到了材料去除分布与冲击角度的去除模型的关系描述公式,其材料去除面形分布与实际抛光面形能很好的符合。

Impact angle influences the characteristic of impinging jet and material removal distribution in fluid jet polishing,it is important for precise optics polishing to research the material removal model influence. Simulations are done by Computational Fluid Dynamics for fluid jet polishing with different impact angles,and experiments are carried out. The results of experiments and simulations show that the material is removed by particles impinging wear and wall movement erosion,and the influence of impact angle in material removal distribution is induced by the jet thickness,velocity and pressure distribution on work piece wall. Based on impinging jet theory,the mathematical expression of material removal distribution and impinging angle remoual model are educed. Comparing the impinging angle material removal model and the experiment removal profile,it is found that the impinging angle removal model is exact.