Defense Event

A Scalable Modular Multistage Peristaltic Electrostatic Gas Micropump

Ali Besharatian

 
Monday, April 01, 2013
1:00pm - 3:00pm
GM Conference Room Lurie Engineering Center

 

About the Event

Miniaturized gas pumps are needed in many emerging environmental, health monitoring and homeland security applications. Pressure and flow are important requirements, which in turn demand high-force, large-stroke, high frequency and low-power actuators, providing of which remains a big challenge in miniaturization and integration of micropumps. Distributing the pumping action onto several small low-force and low-power stages is a potential method to address this issue, which can be done using cascaded (high pressure) and parallel (high flow) multistage configurations; however, previous works have only been successful in utilizing the latter. This is mostly because cascaded stages experience different operating conditions, resulting in non-uniform pressure distribution, and hence, limited scaling capabilities. This work addresses the scalability issues, by introducing a novel multistage design, resulting in uniform pressure distribution, regardless of the number of cascaded stages used. While this enables high-pressure differentials, high flow rates also become possible by fluidic resonance. Moreover, a novel modular fabrication technology is introduced, to implement the resonance-based uniform pressure distribution scheme, as well as addressing feasibility issues, caused by complex microfabrication. As a result, the current work, for the first time, enables truly scalable high-performance gas micropumps, which can be integrated into a wide range of future miniaturized sensing systems.

Additional Information

Sponsor: Professor Khalil Najafi

Open to: Public