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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。
Jet velocity and impact angle affect the dynamic characteristics of impinging jets and have a significant impact on the material removal profile and material removal by jet polishing. The flow field structure of the impinging jet wall is analyzed, and the mathematical relationship between the velocity, pressure and impact angle of the workpiece wall and the jet outlet velocity is established. Based on the analysis of the ideal plane, the influence of the change of jet velocity and impact angle on the workpiece material removal with surface flaws was analyzed. The results show that when the impact angle is about 30 °, the ideal Gaussian surface profile can be obtained. For the flawed workpiece surface, it is more advantageous for material removal at small angle. The removal of workpiece material Both increase with jet velocity.