超声珩磨作用下两空化泡动力学特性

郭策; 祝锡晶; 王建青; 成全; 刘国东

doi:10.6052/0459-1879-14-108

超声珩磨作用下两空化泡动力学特性

中北大学机械与动力工程学院, 太原 030051

基金项目: 国家自然科学基金(50975265,51275490)和山西省研究生优秀创新项目(20143077)资助项目.

详细信息

作者简介:
郭策,博士生,主要研究方向:功率超声.E-mail:guoce1027@163.com

中图分类号: O427.4;TG580.67;N941.3s
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- 文章访问数: 1025
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出版历程
- 收稿日期: 2014-04-17
- 修回日期: 2014-07-26
- 刊出日期: 2014-11-17

DYNAMICAL BEHAVIORS OF DOUBLE CAVITATION BUBBLES UNDER ULTRASONIC HONING

North University of China, School of Mechanics and Power Engineering, Taiyuan 030051, China

Funds: The project was supported by the National Natural Science Foundation of China (50975265,51275490), Graduate Innovation Foundation of Shanxi Province (20143077).

摘要

摘要: 为了探讨超声珩磨作用下磨削区的空化机理,基于速度势叠加原理,考虑超声珩磨速度和珩磨压力,建立了磨削区两空化泡的动力学模型. 数值模拟了磨削区空化泡初始半径、两空化泡间距、超声声压幅值、珩磨压力、珩磨头转速对磨削区两空化泡动力学特性的影响. 研究表明,考虑两空化泡之间的相互作用时,要想获得良好的空化效果,可将两空化泡初始半径之比控制在3 倍以内;选择较高的超声波声压幅值与较低的珩磨压力,并且使超声波声压幅值与珩磨压力和液体静压力之差介于0.66~1.89MPa 之间;增大珩磨头转速空化泡溃灭也略有加速;通过试验测量材料表面粗糙度的方法间接验证了理论分析的合理性.
- 超声振动 /
- 珩磨 /
- 空化 /
- 气泡 /
- 动力学
Abstract: In order to investigate the cavitation mechanism under the effect of ultrasonic honing, based on the superposition principle of fluid velocity potential, the dynamic model of double cavitation bubbles in the grinding area was established with considering ultrasonic honing velocity and honing pressure. The effects of initial cavitation bubble radius, double cavitation bubbles distance, ultrasonic acoustic pressure, honing pressure and honing rotation speed on cavitation bubble dynamics in the grinding area were simulated numerically. The results indicated that considering the interactions between double cavitation bubbles, it can acquire obvious cavitation effect when the initial radius ratio of two bubbles was controlled to be less than 3 (or was less than 3). A higher ultrasonic acoustic pressure and lower honing pressure obtained can also perform a better cavitation effect when the difference among ultrasonic acoustic pressure, honing pressure and fluid static pressure was in the range of 0.66MPa to 1.89MPa. Increasing the honing rotation speed can lead to slightly decrease the duration of the cavitation bubble collapse. The numerical results were well verified indirectly by experiments that the surface roughness of the material was measured to describe the cavitation effect of ultrasonic honing.
- ultrasonic vibration /
- honing /
- cavitation /
- bubble /
- dynamics

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