Numerical investigation on particle impact erosion in ultrasonic-assisted abrasive slurry jet micro-machining of glasses
Numerical investigation on particle impact erosion in ultrasonic-assisted abrasive slurry jet micro-machining of glasses
复制标题
玻璃超声辅助磨料浆喷射微加工中颗粒冲击侵蚀的数值研究
DOI：
10.1016/j.powtec.2016.08.057
复制
发表时间：
2017-06
影响因子：
5.2
通讯作者：
Zhenzhen Chen
中科院分区：
文献类型：
--
作者：
Huan Qi;Donghui Wen;Qiaoling Yuan;Li Zhang;Zhenzhen Chen
提出了一种基于计算流体动力学（CFD）的冲蚀模型，数值研究了磨料浆射流（ASJ）加工过程中超声振动工件对玻璃颗粒冲蚀的影响。采用欧拉-拉格朗日方法和动态网格技术模拟ASJ流动和工件的周期性运动，采用颗粒回弹模型和考虑脆塑转变的玻璃半经验冲蚀模型模拟冲击冲蚀过程。模拟结果表明，滞止区和脆塑转变的共同作用导致了实验中ASJ微细孔加工的W形截面轮廓。然而，在停滞区与超声振动工件的静态压力的周期性变化的观察和它的影响，在停滞附近的颗粒轨迹进行了分析。结果表明，ASJ射流与工件之间的相对运动而不是工件远离喷嘴出口的相对位置导致了颗粒对靶面的动态冲击，不仅增加了平均冲蚀率，而且有助于靶面上冲蚀面积的均匀分布。此外，ASJ直接冲击区周围的粘性流引起的侵蚀被发现是由于更多的多次冲击的颗粒以下的粘性流的影响，是由超声振动工件，这将扩大ASJ加工区域作为冲击事件的进展。仿真结果对提高ASJ微细加工效率和加工质量具有重要意义。
A Computational Fluid Dynamics based erosion model is presented to numerically study the influence of ultrasonic vibrating workpiece on the particle impact erosion of glasses involved in the abrasive slurry jet (ASJ) machining process. The Eulerian-Lagrangian method and dynamic meshing technique are used to represent the ASJ flow and the periodical movement of the workpiece, while the particle rebound model and semi-empirical erosion model for glasses by considering the brittle-ductile transition are employed to simulate the impact erosion process, respectively. It has been found from simulation that the combined effects of stagnation zone and brittle-ductile transition that results in W-shaped cross-sectional profiles in ASJ micro-machining of holes in experiment. However, in the stagnation zone with an ultrasonic vibrating workpiece a periodical variation of static pressure is observed and its influence on the particle trajectory near the stagnation has been analysed. It is found that the relative movement between the ASJ flow and workpiece rather than the relative location of the workpiece far away from the nozzle exit results in the dynamic impacts of particles on the target surface which not only increase the average erosion rate but also contribute to the uniform distribution of the erosion area on the target surface. Further, the erosion induced by the viscous flow around the ASJ directly impact zone is found to be enhanced due to the more multiple impacts by the particles following the viscous flow that is affected by the ultrasonic vibrating workpiece, which would enlarge the ASJ machining area as the impact event progresses. These findings from the simulation are significant for the improvement of the ASJ micro-machining efficiency and quality.
登录
查看更多内容
使用磨料浆料射流超声振动辅助玻璃微通道的数值和实验研究
DOI：
10.1016/j.ijmecsci.2016.03.013
发表时间：
2016-05-01
影响因子：
7.3
作者：
Qi, Huan;Wen, Donghui;Li, Gang
通讯作者：
Li, Gang
影响因子：
5.2
作者：
K. Kowsari;H. Nouraei;B. Samareh;M. Papini;J. K. Spelt
通讯作者：
K. Kowsari;H. Nouraei;B. Samareh;M. Papini;J. K. Spelt
影响因子：
5
作者：
H. Nouraei;K. Kowsari;J. K. Spelt;M. Papini
通讯作者：
H. Nouraei;K. Kowsari;J. K. Spelt;M. Papini
DOI：
10.1177/0954405414528167
发表时间：
2015-03
期刊：
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture
影响因子：
--
作者：
H. Qi;J. Fan;Jun Wang
通讯作者：
H. Qi;J. Fan;Jun Wang
影响因子：
5.2
作者：
Chu, K. W.;Wang, B.;Vince, A.
通讯作者：
Vince, A.