电磁驱动膜片式微滴喷射数值模拟与试验
Numerical Simulation and Experimental Study of Electromagnetic Driven Droplet Jetting
梁海明 1韦相福 2林明松 1殷梦闯1
作者信息
- 1. 广西交通职业技术学院 汽车工程学院,南宁 530004
- 2. 广西交通职业技术学院 汽车工程学院,南宁 530004;广西大学 机械工程学院,南宁 530004
- 折叠
摘要
针对目前微液滴喷头问题,设计了一种基于电磁驱动的微滴喷射装置.建立了多物理场耦合喷射仿真模型,通过数值模拟分析了驱动电压、流体粘度对微滴体积和喷射速度的影响.并利用搭建的喷头试验平台进行微滴喷射试验.结果表明:微滴体积以及喷射速度随着驱动电压幅值的增大而增大,随着流体粘度的增大液滴的断裂时间延后且液滴的拖尾逐渐减短;在喷孔直径为0.12mm、驱动电压21V、粘度0.001mPa·s时可按需生成体积约5.7nL的均匀微滴;微滴喷射试验结果与仿真结果吻合较好,说明提出的数值模型及方法是可行的,且验证了设计的电磁驱动膜片式喷头生成稳定液滴的可行性.
Abstract
Aiming at the current microdroplet nozzle problem,a microdroplet spraying device based on electromagnetic drive is designed.A multi-physical field coupled spray simulation model is established,and the influence of the driving voltage and fluid viscosity on the microdroplet volume and spray velocity are analyzed through numerical simulation.The microdroplet spraying test is carried out using the built nozzle test platform.The results show that the droplet volume and jetting velocity increase with the increase of driving voltage amplitude,the droplet breakage time is delayed with the increase of fluid viscosity,and the droplet trailing is gradually shortened.The uniform droplets with a volume of approximately 5.7 nL can be generated on demand when the diameter of the nozzle hole is 0.12 mm,the driving voltage is 21 V and the viscosity is 0.001 mPa·s.The results of the microdroplet spray test and the simulation results match well,indicating that the proposed numerical model and method can be used to analyze the influence of the driving voltage and fluid viscosity on the droplet volume and jetting velocity by numerical simulation.It shows that the proposed numerical model and method are feasible,and verifies the feasibility of the designed electromagnetic drive diaphragm nozzle to generate stable droplets.
关键词
电磁驱动/多物理场仿真/微滴喷实验Key words
electromagnetic drive/multi-physical field simulation/micro spray experiment引用本文复制引用
基金项目
广西自然科学基金项目(2020GXNSFAA159156)
2023年度广西高校中青年教师科研基础能力提升项目(2023KY1173)
出版年
2024
NETL
NSTL
万方数据