Abstract

This article provides a comprehensive analytical and numerical modeling procedure for characterizing the dynamics of flow fields in both the traditional circular and the new, efficiency- enhanced chambers of valveless micropump systems. The flow dynamics of the traditional circular valveless micropump system are analytically modeled and experimentally verified by comparing the results with data measured directly from a real-world system that has been discussed in the literature. The validated comprehensive modeling procedure is then extended to model the efficiency- enhanced micropump system in order to increase net flow rate and expanding the operational working range of the back pressure for possible micro devices aimed at applications for many high-performance industrial applications.

A comparison of the associated system frequencies in both micropump systems shows, that the resonance frequency of the efficiency- enhanced micropump system is increased from 31 Hz to 38 Hz. The maximum net flow rate of the new system is also increased dramatically to a level of 1.74 ml/min, which is approximately 50% higher than that of the conventional setup. As long as the same input driving power is applied to both systems, the overall operating efficiency of the proposed micropump system is increased by approximately 58%. Meanwhile, the best- efficiency point (BEP) is stepped up from 0.56 ml/min to 1.1 ml/min. The enhancement of the BEP thus makes it possible for the back pressure to be operate more effectively in the range of 64 ∼ 100 Pa.

摘要

本文提供了一个全面的分析和数值建模程序，用于表征传统圆形和新型、效率增强的无阀微泵系统腔室中的流场动力学。通过将结果与直接从文献中讨论的真实世界系统测量的数据进行比较，对传统圆形无阀微泵系统的流动动力学进行了分析建模和实验验证。然后将经过验证的综合建模程序扩展到对效率增强的微型泵系统进行建模，以增加净流量并扩大针对许多高性能工业应用的可能微型设备的背压操作工作范围。

两个微泵系统中相关系统频率的比较表明，效率增强的微泵系统的共振频率从 31 Hz 增加到 38 Hz。新系统的最大净流量也大幅增加到 1.74 毫升/分钟的水平，比传统设置高出约 50%。只要将相同的输入驱动功率应用于两个系统，所提出的微型泵系统的整体运行效率就会提高约 58%。同时，最佳效率点 (BEP) 从 0.56 毫升/分钟提高到 1.1 毫升/分钟。因此，BEP 的提高使得背压在 64 ∼ 100 Pa 范围内更有效地运行成为可能。