射流速度和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型和材料去除量有重要的影响。对冲击射流壁面流场结构进行了分析, 建立了工件壁面上的速度、压力与冲击角度、射流出口速度的数学关系。在分析理想平面的基础上, 重点分析了射流速度和冲击角度的变化对存在表面瑕疵的工件材料去除量的影响。结果表明: 对于理想平面, 当冲击角度大约为30°时, 可得到理想的高斯型面型分布; 对于存在瑕疵的工件表面, 在小角度冲击时更有利于材料的去除; 工件材料的去除量均随着射流速度的增大而增大。

Fluid jet velocity and impinging angle influence 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.By analyzing the flow field characteristics of impinging jet,mathematical relationship between impinging angle,jet velocity,pressure on wall is established.Based on the analysis of the ideal plane, the influence of jet velocity and impinging angle on material removal amount of the workpiece surface defect is analyzed. The results show that when impinging angle is 30°, the Gauss-type distribution on the ideal plane is got.It is more conducive to the removal of material when small impinging angle on the workpiece surface defect is used.In addition,the workpiece material removal amount increases with the increase of jet volecity.