第19卷
第9期
2011年9月
文章编号
1004-924X(2011)09-2092-08
光学精密工程
Optics and Precision Engineering
Vol, 19
No, 9 Sep.2011
结构化表面环境下软磨粒流的流场数值分析
计时鸣‘，马宝丽1.2，谭大鹏1
(1.浙江工业大学特种装备制造与先进加工技术教育部重点实验室，浙江杭州310032；
2.杭州师范大学钱江学院，浙江杭州310012)
摘要：为了研究模具结构化表面环境下软性磨粒流的流场加工特性，应用单颗动力学模型（SPD)通过数值模拟求解了颗粒在不同形态的凿流场中的运动特性。以U形流道为例，利用N-S方程、淄流的Realizable(k-t)模型以及压力耦合方程的半隐相容(SIMPI.EC)算法.求解了软性磨粒两相流场中流体的速度、压力等特性参数；接着利用SPD求解多种环境下软性磨粒两相流场中颗粒的速度、轨连、密度分布等参数。实验结果表明；在流体初始速度为5，10，20m/s3种情况下，流体初始速度为5m/s时题粒沉降最为明显；在颗粒直径为0.01,0,05，0.1mm3种情况下，直径为0.01mm时颗粒况降较为明显；在水、柴油、机油3种不同黏度的端流场中，两相软性磨粒流场特性非常接近。结论显示，流体的初始速度
和颗粒的粒径使得瑞流对颗粒运动特性影响较大，流体的黏性对其影响较小。关键调：模具批光；结构化表面；软鹿粒流加工；单颗动力学模型；数值模权
中图分类号：TG580.692
文献标识码：A
doi;10.3788/0PE,20111909,2092
Numericalanalysisofsoftabrasiveflowin
structured restraintflowpassage JI Shi-ming',MA Bao-li'·, TAN Da-peng'
(l. Key Laboratory of Special Purpose Equipment and Aduanced Processing Technology of the Ministry of Education of Chind , Zhejiang University of Technology, Hangzhou 31o032,China;
2.Qianjiang College,Hangzhou Normal University,Hangzhou 310012,China)
Corresponding author,E-mail tandapeng@zjut,edu.cn
Abstract: In order to explore machining characteristics of the soft abrasive flow field in a structured mold surface, the Single Dynamics Model(SPD) was applied to the solution to the motion characteris tics of particles in different types of turbulence fields numerically. By taking a U-shaped flow passage for an example, the velocity and pressure of fluid in a two-phase soft abrasive flow field were solved by using the N-S equations,a Realizable k-e model of turbulence and the SIMPLEC method. Then the velocity, locus and the density of particles in the two-phase field were also obtained by the SPD mod-el. The results are that when the initial fluid velocities are 5, 1O and 20 m/s, the particle deposition is the largest for the first case. When the particle diameters are 0. 01, 0, 05 and 0. 1 mm, the first valuc causes the particle deposition to be most obvious. In turbulence fields with different viscosities, the
收稿日期：2011-01-07；修订日期：2011-01-29
基金项目：国家自然科学基金面上项目（No,50875242，No.50905163)；浙江省自然科学基金重点项目（No.Z107517)