Influence of input signal on injection performance for needle driven piezoelectric micro-jet device
Influence of input signal on injection performance for needle driven piezoelectric micro-jet device
复制标题
输入信号对针驱动压电微射流装置喷射性能的影响
DOI：
10.1007/s00542-020-04991-7
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发表时间：
2020-08
期刊：
影响因子：
--
通讯作者：
Songmei Yuan
中科院分区：
文献类型：
--
作者：
Chaochao Sun;Xiangcheng Chu;Shuhao Yan;Xueyang Zheng;Le Liu;Xiumei Wang;Songmei Yuan
由于针驱动压电微射流装置具有响应速度快、精度高、工作频率高等特点，已在各个工业领域得到应用。注射性能对于应用非常重要。微滴的喷射速度对韧带长度和卫星有很大影响。本文建立了动态网格运动的Fluent仿真模型来模拟喷射过程。同时，研究了微滴体积和喷射速度对输入信号（包括电压、下降时间和流体压力）的依赖性。结果表明，通过调节下落时间可以改变微滴的喷射速度，且体积不变，可用于指导针驱动压电微射流装置的控制。此外，还设计了实验系统，实验表明平均最小喷射速度约为0.724 m/s。韧带长度几乎随着微滴的喷射速度线性增加。最佳喷射速度小于2.745 m/s，无法生成卫星。
Due to the fast response, high precision and high working frequency, needle driven piezoelectric micro-jet devices have been applied in various industrial fields. The injection performance is important for the applications. The jetting velocity of the micro-droplets has a great influence on the ligament length and satellites. In this paper, the Fluent stimulation model of dynamic mesh motion has been established to simulate the jetting process. Meanwhile, the dependences of volume and jetting velocity of micro-droplets on input signal, including voltage, falling time, and fluid pressure, have been studied. The results show that the jetting velocity of micro-droplets can be changed and the volume is invariant by adjusting falling time, which can be used to guide the control of the needle driven piezoelectric micro-jet devices. Furthermore, the experimental system has been designed and the experiments show that the average minimum jetting velocity is about 0.724 m/s. The ligament length increases almost linearly with jetting velocity of the micro-droplets. And the optimal jetting velocity is less than 2.745 m/s, which cannot generate satellites.
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