微滴喷射中喷嘴间距对微滴轨迹影响的研究  

Research on the influence of nozzle spacing on droplet trajectory in droplet ejection

作　　者：杨伟东[1,2] 线洪萱 刘卫胜 王媛媛 YANG Weidong;XIAN Hongxuan;LIU Weisheng;WANG Yuanyuan(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;National Engineering Research Center for Technological Innovation Methods and Tool,Tianjin 300401,China)

机构地区：[1]河北工业大学机械工程学院,天津300401 [2]国家技术创新方法与实施工具工程技术研究中心,天津300401

出　　处：《现代制造工程》2022年第9期15-21,共7页Modern Manufacturing Engineering

基　　金：河北省科技重大专项项目(21284901Z)。

摘　　要：以某款压电阵列式喷头为研究对象,喷射液体材料选用呋喃树脂,研究微滴喷射中喷嘴间距对微滴喷射轨迹的影响规律。采用守恒水平集方法建立了微滴喷射多喷嘴的仿真模型,通过实验和仿真相结合的方法分析了实验驱动电压和仿真入口压强的关系,通过拟合公式法得出二者拟合关系式。数值模拟结果表明,在该阵列式喷头的喷射过程中,相邻液滴有相互靠近的趋势。喷嘴间距和液滴实际喷射轨迹与理想喷射轨迹之间偏移的距离阈值存在一定的线性关系。当喷嘴间距小于距离阈值时,液滴实际喷射轨迹几乎不受影响;而当喷嘴间距大于距离阈值时,液滴实际喷射轨迹会偏离理想喷射轨迹。A certain piezoelectric array nozzle was used as the research object,and furan resin was selected as the spraying liquid material,and the influence of nozzle spacing on droplet ejection trajectory in droplet ejection was studied.A conserved level set method was used to establish a simulation model of droplet jet multi-nozzle.The relationship between the experimental driving voltage and the simulated inlet pressure was analyzed through a combination of experiment and simulation,and the fitting relationship between the two was obtained by the fitting formula method.Numerical simulation results show that during the ejection process of the array nozzle,adjacent droplets tend to approach each other.There is a certain linear relationship between the nozzle spacing and the distance threshold at which the droplets shift.When the nozzle spacing is less than the distance threshold,the droplet ejection trajectory is almost unaffected;when the nozzle spacing is greater than the distance threshold,the droplet ejection trajectory will deviate from the ideal jet trajectory.

关 键 词：微滴喷射 压电阵列式喷头 水平集方法 数值模拟 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP69[自动化与计算机技术—计算机科学与技术]