标题: | 压电无阀式微帮浦流固耦合分析 Fluid-Structure Coupling Analysis of Piezoelectric Valveless micropump |
作者: | 陈俊佑 Chen, Chun-Yu 崔燕勇 Tsui, Yeng-Yung 机械工程学系 |
关键字: | 微帮浦;流固耦合;压电薄膜;micropump;Fluid-Structure Coupling;Piezoelectric membrane |
公开日期: | 2008 |
摘要: | 本研究为模拟压电无阀式微帮浦流固耦合分析。在模拟当中,将利用ANSYS软体计算压电致动器振动位移并将与CFD程式相互结合运算。在计算时将帮浦内流场压力视为作用在压电致动器表面之外力,以探讨在不同操作频率下微帮浦之特性。且在研究中比较压电致动器之位移模拟结果与振动学之理论解,且出现相似现象与结果。结果发现在不同负载频率下,微帮浦将出现相位差的现象,并且在1590Hz时会有最大相位的发生。文中指出当忽略流场压力对压电致动器影响时的结果比较,得到当随着帮浦操作频率愈高时,流场压力对压电致动器之影响愈大之结论,也因此结论而得知当微帮浦作动时须在一最佳频率操作方能得到最佳效能之结果。并显示当负载频率愈高,即愈不可将流场压力对压电致动器之影响忽略,此现象都将与实验相符合。 This research is the Fluid-structure coupling analysis of piezoelectric valveless micropump. In the simulation, we use the ANSYS software to computation the displacement of the piezoelectric actuators and operation mutually with the CFD program. In the study, the chamber pressure of the pump is regarded as the force on the surface of the piezoelectric actuator, and discuss characteristic of the micro pump under different excited frequency. Also compares the displacement of the piezoelectric actuators of the ANSYS simulation result with theory of vibration solution and presents the similar phenomenon. The result demonstration under the different excited frequency, the micropump will present the phase difference and the biggest phase occurrence in 1590Hz. In the study pointed out the pressure of the pump affect to the piezoelectric actuators is more obvious when increases the excited frequency. However, the result show when the micropump operative, it have to in the most suitable excited frequency be able to obtain result of the best efficiency. In conclusion, it can not neglect the pressure of the pump to influence the piezoelectric actuators when the higher excited frequency. This phenomenon tallies with the experiment. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079614562 http://hdl.handle.net/11536/42131 |
显示于类别: | Thesis |