超声空化微射流建模与仿真

中国机械工程 ›› 2015, Vol. 26 ›› Issue (21): 2890-2894.

超声空化微射流建模与仿真

叶林征;祝锡晶;郭策

中北大学，太原，030051

出版日期:2015-11-10 发布日期:2015-11-06
基金资助:
国家自然科学基金资助项目(51275490)

Ultrasonic Cavitation Micro-jet Modeling and Simulation

Ye Linzheng;Zhu Xijing;Guo Ce

North University of China,Taiyuan，030051

Online:2015-11-10 Published:2015-11-06

摘要/Abstract

摘要：

为探求功率超声珩磨中空化作用产生的微射流对壁面的冲击作用，考虑液体压缩性，基于连续方程及动量方程，建立了壁面峰值压力及滞止压力公式。应用耦合欧拉拉格朗日（CEL）方法建立了微射流冲击壁面的有限元模型，并对壁面压力、壁面变形等进行了数值研究。结果表明：壁面的峰值压力、最大变形深度及最大等效应变均出现在射流冲击的边缘；铝板在微射流冲击后出现深约0.11μm的凹坑，并在凹坑边缘有材料隆起；壁面塑性变形主要发生在冲击前期，等效应变呈环形分布。空化微射流的冲击有利于材料的去除。

关键词: 超声空化, 微射流冲击, 耦合欧拉拉格朗日（CEL）方法, 材料变形

Abstract:

To explore the impacts of micro-jet on the wall generated by cavitation in the power ultrasonic honing, liquid compressibility was considered, the peak pressure and stagnation pressure formulas of the wall were established based on the continuity and momentum equations. CEL method was applied to establish the finite element model of micro-jet impinging wall, and the wall pressure and wall deformation were numerically studied. The results are: the peak pressure, maximum deformation depth and maximum equivalent strain of the wall all appear at the edge of the jet impingement; a about 0.11μm deep pit appears on the aluminum plate after impacted by the micro-jet, and material uplift at the edge of the pit; wall plastic deformation occurs mainly at the early stage of the impact, and the equivalent strain distribution presents in a ring. The impact of the cavitation micro-jet is advantageous to the material removal.

Key words: ultrasonic cavitation, micro-jet impact, coupled Eulerian Lagrangian(CEL) method, material deformation

中图分类号:

叶林征, 祝锡晶, 郭策. 超声空化微射流建模与仿真[J]. 中国机械工程, 2015, 26(21): 2890-2894.

Ye Linzheng, Zhu Xijing, Guo Ce. Ultrasonic Cavitation Micro-jet Modeling and Simulation[J]. China Mechanical Engineering, 2015, 26(21): 2890-2894.

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