中国机械工程 ›› 2011, Vol. 22 ›› Issue (8): 952-956.

• 机械基础工程 • 上一篇    下一篇

矩形流道近壁区磨粒的运动分析

许京雷1,2;计时鸣1;谭大鹏1
  

  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,杭州,310014
    2.中原工学院,郑州,450007
  • 出版日期:2011-04-25 发布日期:2011-05-04
  • 基金资助:
    国家自然科学基金资助项目(50875242);浙江省自然科学基金资助重点项目(Z107517);浙江省机械电子工程重中之重学科和特种装备制造与先进加工技术教育部重点实验室开放基金资助项目(20090303)
    National Natural Science Foundation of China(No. 50875242);
    Key Program of Zhejiang Provincial Natural Science Foundation of China(No.Z107517)

Motion Analysis of Abrasive Particle in Near Wall Region of Rectangular Channel

Xu Jinglei1,2;Ji Shiming1;Tan Dapeng1
  

  1. 1.Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,Ministry of Education,Zhejiang University of Technology,Hangzhou,310014
    2.Zhongyuan University of Technology,Zhengzhou,450007 
  • Online:2011-04-25 Published:2011-05-04
  • Supported by:
     
    National Natural Science Foundation of China(No. 50875242);
    Key Program of Zhejiang Provincial Natural Science Foundation of China(No.Z107517)

摘要:

将流体运动方程、磨粒动力学方程和数值模拟方法相结合,给出了矩形流道近壁区磨粒的运动规律。根据流体黏性参数和湍流条件得到了磨粒流加工泵的参数,使用多种直径的磨粒确定了磨粒流的运行轨迹。流体的黏度和速度越大,壁面压力和剪切力越大,越有利于工件表面材料去除。磨粒流主要沿流动方向运动,大直径磨粒适用于光整加工的粗加工阶段,小直径磨粒适用于细加工阶段。流体压力和磨粒速度分布对光整加工具有很好的指导意义。

关键词:

Abstract:

Based on the fluid motion equation, abrasive particle kinetic equation and numerical simulation method, motion rules of abrasive particle in near wall region of rectangular channel were analyzed in detail. The parameters of abrasive particle pump were given according to fluid viscosity and turbulent flow conditions. Abrasive particle motion traces were determined by applying particles of different diameters. The greater viscosity and velocity can cause greater wall pressure and shear stress, which is helpful to make material removal on work piece surface. Abrasive particles mainly move along the flow direction, among which the bigger are suited for rough machining, the smaller for fine finishing. The distribution of pressure and velocity has a strong significance on surface finishing.

Key words: near wall region, abrasive particle flow, numerical simulation, turbulent flow

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