为了给出射流抛光系统的优化设计参数,从理论上分析了冲击射流流场的结构特点,建立了工件壁面上的速度、压强与冲击角度、射流出口速度以及冲击距离的数学关系。就不同参数对射流流场分布的影响进行了定量计算,结果表明,工件壁面上的压强和速度与出口压强和速度成线性正比关系。当冲击距离大于9.6d(d为射流喷口的直径)时,工件壁面压强和速度随冲击距离的增大而减小,冲击距离增加到15d时,壁面压强最大值减小到0.54p0(p0为射流出口处的压强)。工件壁面压强和速度随冲击角度的减小而减小,当入射角为90°、60°和45°时,分别得到壁面压强最大值ps=0.95 p0,0.74p0,0.475p0,上游速度最大值um02=0.96u0,0.8u0,0.67u0(u0为射流出口处的速度)。 In order to give the optimal design parameters of the jet polishing system, the structural characteristics of the jet flow field are theoretically analyzed, and the mathematical relationship between the velocity, pressure and impact angle, jet exit velocity and impact distance on the workpiece wall is established. The effects of different parameters on the jet flow field are quantitatively calculated. The results show that the pressure and velocity on the wall of the workpiece are linearly proportional to the outlet pressure and velocity. When the impact distance is more than 9.6d (d is the diameter of the jet orifice), the pressure and velocity on the wall surface of the workpiece decrease with the increase of the impact distance. When the impact distance increases to 15d, the maximum wall pressure decreases to 0.54p0 Jet outlet pressure). The pressure and velocity of the workpiece wall surface decrease with the decrease of the impact angle. When the incident angle is 90 °, 60 ° and 45 °, the maximum wall pressure ps = 0.95 p0, 0.74p0, 0.475p0, the maximum upstream velocity um02 = 0.96u0, 0.8u0, 0.67u0 (u0 is the velocity at the jet outlet).