射流抛光中的流场特性研究  

Analysis of flow field characteristics in fluid jet polishing

作　　者：罗银川[1,2] 李秀龙[2] 张杨[2] 张蓉竹[2] 杨李茗[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]四川大学电子信息学院,四川成都610064

出　　处：《光学技术》2014年第4期376-380,共5页Optical Technique

基　　金：四川省教育厅创新团队资助项目(13TD0048)

摘　　要：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)。By analyzing the flow field characteristics of impinging jet,mathematical relationship between the impact angle,stand-off distance,jet velocity and the pressure,velocity on wall is established.The influence of different parameters on fluid jet distribution is analyzed by quantitative calculate,the results indicate that the pressure and velocity on wall with the outlet pressure,velocity is linearly proportional.When the impact distance is greater than 9.6times of the diameter of nozzle,the pressure and velocity on wall decrease with the increasing of stand-off distance.The peak pressure reduces to 0.54times of the pressure of spout when the impact distance increases to 15times of the diameter of nozzle.And they decrease with the decreasing of impact angle.When impact angles are 90°,60°,45°,ps=0.95p0,0.74p0,0.475p0,and um02=0.96u0,0.8u0,0.67u0are got respectively.

关 键 词：冲击射流 流场特性 壁面压强 

分 类 号：TP60[自动化与计算机技术—控制理论与控制工程]