Three-phase abrasive flow polishing and distribution characteristics of bubble collapse

Shi-ming JI; Jiang-qin GE; Da-peng TAN; Xi ZENG

doi:10.3788/OPE.20182602.0388

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Three-phase abrasive flow polishing and distribution characteristics of bubble collapse

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-07-05

- Three-phase abrasive flow polishing and distribution characteristics of bubble collapse
- Optics and Precision Engineering Vol. 26, Issue 2, Pages: 388-398(2018)
- 作者机构：
  
  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 310014
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182602.0388
  CLC： TG580.692.2
- Received：26 May 2017，
  
  Accepted：08 July 2017，
  
  Published：25 February 2018
- 稿件说明：
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Shi-ming JI, Jiang-qin GE, Da-peng TAN, et al. Three-phase abrasive flow polishing and distribution characteristics of bubble collapse[J]. Optics and precision engineering, 2018, 26(2): 388-398.
DOI：

Shi-ming JI, Jiang-qin GE, Da-peng TAN, et al. Three-phase abrasive flow polishing and distribution characteristics of bubble collapse[J]. Optics and precision engineering, 2018, 26(2): 388-398. DOI： 10.3788/OPE.20182602.0388.

摘要

针对软性磨粒流在加工硬脆性材料时效率低下的问题，本文提出一种气-液-固三相磨粒流加工方法。该方法通过在加工流场内注入微尺度气泡群，利用气泡溃灭释放的能量提升磨粒流加工能力。基于计算流体力学和群体平衡模型耦合计算方法，建立气-液-固三相磨粒流流体力学模型，数值模拟结果揭示了工件表面三相磨粒流形成高速湍流涡旋流场加工特性，得到了工件表面气泡溃灭的分布规律，并探明流体黏度与气泡溃灭之间的关系。图像粒子测速实验表明，通入微尺度气泡群后，平均速度从12.50~13.50 m/s提升至15.00~17.00 m/s，最高平均速度可达20.00 m/s以上。对比加工实验显示，经8 h加工后，粗糙度从0.50

m降低到0.05

m。理论和实验研究结果说明借助微尺度气泡群的溃灭效应可有效提升软性磨粒流的加工效率和加工精度。

Abstract

To resolve the low processing efficiency of softness abrasive flow method (SAF) for hard brittle materials

a gas-liquid-solid three-phase abrasive flow processing method (GLSP) was proposed. Through injecting the micro bubbles into processing flow field and by means of the bubble collapse energy

the processing capability of abrasive flow could be strengthened. The fluid mechanics model of GLSP was established based on computational fluid dynamics-population balance model (CFD-PBM) coupled method. The simulation results revealled the dynamic characteristics of the high-speed turbulent vortex flow field formed by the gas-liquid-solid three-phase abrasive flow

and the bubble collapse distribution could be obtained

furthermore

the effect of fluid viscosity on bubble collapse was analyzed. The results of particle image velocimetry show that through injecting micro bubbles

the average velocity could be increased from 12.50-13.50 m/s to 15.00-17.00 m/s

and the maximum value could reach above 20.00 m/s. The comparison processing experiments showed that the roughness increased from 0.09

m to 0.05

m after 8 h processing. The above results indicate that the effect of bubble collapse can effectively improve the processing efficiency and precision of SAF method.

关键词

Keywords

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