摘要
针对液动压悬浮抛光固-液两相流中固相颗粒与工件表面撞击的过程,对不同加工工况下的固相颗粒与工件表面的撞击角度和速度进行了研究。采用计算流体力学方法建立了液动压悬浮抛光流场的三维模型,并输出了固相颗粒撞击工件表面的速度场;同时使用粒子图像测速方法对不同工况下的抛光流场进行了试验观测。研究结果表明:CFD模拟获得的撞击速度值与PIV观测值非常接近,且随转速增加,PIV观测值受固相颗粒之间的撞击效应影响越大;抛光过程中固相颗粒撞击工件表面的角度非常小,近似于在工件表面平行摩擦,且抛光盘转速和抛光液浓度对撞击角度的影响很小。
Aiming at the process of solid particles impacting the workpiece involved in hydrodynamic suspension polishing,the impact angle and velocity between particles and workpiece surface was studied with different working conditions.A three-dimensional model of the hydrodynamic suspension polishing flow field was established by CFD and the velocity field during particles impacting the surface of workpiece was calculated.The experimental observations under different working conditions was carried out by PIV.The results indicate that the velocity distribution of solid particle calculated by CFD software are accord with the actual velocity distribution observed by PIV,and the PIV values are more affected by the impact effect between solid particles with the increase of rotation speed.The angle that solid particles impact workpiece is very small in hydrodynamic suspension polishing,which is similar to parallel friction on the workpiece surface,and the rotation speed of polishing disc and the concentration of polishing liquid have little influence on the impact angle.
作者
谢重
齐欢
杨杰
XIE Zhong;QI Huan;YANG Jie(School of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Schoolof Electrical andMechanical Engineering,Taizhou Vocational and Technical College,Taizhou 318000,China)
出处
《机电工程》
CAS
北大核心
2020年第4期389-393,共5页
Journal of Mechanical & Electrical Engineering
基金
浙江省自然科学基金资助项目(Y14E050057)
台州职业技术学院校级重点课题(2018ZD01)。
关键词
液动压悬浮抛光
撞击速度
撞击角度
计算流体动力学
粒子图像测速
hydrodynamic suspension polishing
impact angle
impact velocity
computational fluid dynamics(CFD)
particle image velocimetry(PIV)
