一种合成射流压电微泵关键结构参数确定方法

发布时间：2018-04-24 02:32

本文选题：压电微泵 + 合成射流　；参考：《哈尔滨工业大学学报》2016年01期

【摘要】：为增大无阀微泵流量,改进合成射流微泵设计方法,设计一种基于合成射流压电激励器的微泵结构,并提出关键结构参数的确定方法.在合成射流激励器流场模拟结果基础上,绘制其轴线上的轴向瞬时速度变化曲线以及出口横截面上的轴向速度分布曲线,利用轴线上轴向速度稳定点以及出口横截面上轴向速度分布曲线的零点确定最佳泵腔高度和出口直径.对所选用的合成射流激励器流场进行三维数值模拟,结果表明:利用该方法得到微泵结构的最佳泵腔高度为7 mm,最佳出口直径为1.78 mm.在零背压下,当雷诺数为225、频率为100 Hz时,该合成射流微泵流量可达32.1 m L/min.数值仿真与实验对比验证了方法的可行性.利用该方法可以有效地确定该类微泵在大流量且连续稳定出流性能下的关键结构尺寸.
[Abstract]:In order to increase the flow rate of valveless micro-pump and improve the design method of synthetic jet micro-pump, a structure of micro-pump based on the piezoelectric actuator of synthetic jet was designed, and the method of determining the key structural parameters was proposed. On the basis of the flow field simulation results of the synthetic jet actuator, the axial instantaneous velocity variation curve on the axis and the axial velocity distribution curve on the exit cross section are plotted. The optimum pump cavity height and outlet diameter are determined by using the zero point of axial velocity distribution curve on the axial axis and the exit cross section. Three-dimensional numerical simulation of the flow field of the selected synthetic jet actuator shows that the optimum pump cavity height is 7 mm and the optimum outlet diameter is 1.78 mm by using this method. At zero back pressure, when the Reynolds number is 225 and the frequency is 100 Hz, the flow rate of the synthetic jet micropump can reach 32.1 mL / min. The feasibility of the method is verified by numerical simulation and experimental results. By using this method, the key structural dimensions of this kind of micropumps can be effectively determined under the condition of large flow rate and continuous steady discharge performance.
【作者单位】：江苏大学能源与动力工程学院;江苏大学流体机械工程技术研究中心;江苏大学理学院;
【基金】：国家自然科学基金(51276082) 江苏高校优势学科建设工程(苏政办发[2014]37号)
【分类号】：TH38

【共引文献】