基于水平集法的金属液滴按需喷射过程数值模拟  

Numerical Simulation of Drop-on-Demand Jetting Process of Metal Droplet Based on Level Set Method

作　　者：王鹏云[1] 李贺军[1] 齐乐华[1] 罗俊[1] 李海鹏[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2013年第S2期520-524,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51005186和51105314);高等学校学科创新引智计划"111"(B08040);凝固技术国家重点实验室基金项目(SKLSP201008)

摘　　要：基于改进的水平集法(Level Set Method)建立了金属液滴按需喷射过程的有限元模型,研究了气体脉冲作用下金属液滴的喷出过程,考察了脉冲宽度及脉冲压力对液滴初始速度及尺寸的影响。结果表明:水平集方法可以有效追踪按需喷射铝液滴和保护气体间的自由界面;液滴直径随脉冲宽度呈线性增加,但液滴初始速度变化不大;随着脉冲压力的升高,液滴初始速度显著增加,但液滴直径变化不大。Metal droplet drop-on-demand(DOD) jetting process involves a two-phase flow accompanied by a free interface.In this paper,a new model based on a level set method(LSM) was developed to investigate the DOD jetting of Al droplets under pulsed argon gas.The effects of the gas pulse width and pulse pressure on the ejected droplet velocity and size were analyzed.The results show that LSM has the excellent capacity of tracking the free interface between the Al droplet and shielding gas.Moreover,the droplet diameter increases linearly with the pulse width.With the rise of the pulse pressure,initial droplet velocity is significantly increased.

关 键 词：水平集法 两相流 数值模拟 金属液滴 按需喷射 

分 类 号：TG39[金属学及工艺—金属压力加工]