Zhou Can, Deng Guiling, Li Junhui, Duan Ji'an
School of Mechanical and Electronical Engineering, Central South University, No. 932, South Lushan Road, Changsha 410083, China.
School of Information Science and Engineering, No.932, South Lushan Road, Changsha 410083, China.
Sensors (Basel). 2018 Apr 20;18(4):1270. doi: 10.3390/s18041270.
To improve the jet performance of a bi-piezoelectric jet dispenser, mathematical and simulation models were established according to the operating principle. In order to improve the accuracy and reliability of the simulation calculation, a viscosity model of the fluid was fitted to a fifth-order function with shear rate based on rheological test data, and the needle displacement model was fitted to a nine-order function with time based on real-time displacement test data. The results show that jet performance is related to the diameter of the nozzle outlet and the cone angle of the nozzle, and the impacts of the flow channel structure were confirmed. The approach of numerical simulation is confirmed by the testing results of droplet volume. It will provide a reliable simulation platform for mechanical collision-based jet dispensing and a theoretical basis for micro jet valve design and improvement.
为了提高双压电射流分配器的射流性能，根据其工作原理建立了数学模型和仿真模型。为了提高仿真计算的准确性和可靠性，基于流变学测试数据将流体的粘度模型拟合为与剪切速率相关的五次函数，基于实时位移测试数据将针位移模型拟合为与时间相关的九次函数。结果表明，射流性能与喷嘴出口直径和喷嘴锥角有关，并证实了流道结构的影响。数值模拟方法得到了液滴体积测试结果的验证。它将为基于机械碰撞的射流分配提供可靠的仿真平台，并为微喷射阀的设计和改进提供理论依据。
