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Efficiency of a Micro Pump driven by Conducting Polymer Soft Actuator with Open/Close movement
Yoshitaka Naka,Masaki Fuchiwaki,Kazuhiro Tanaka 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In recent years, the research of micro pumps are actively conducted with the rise of MEMS (Micro ElectroMechanical Systems) technology. In this study the authors have realized the micro pump driven by conducting polymer soft actuator that perform open/close movement based on polypyrrole and measured their performance. It could adjustflow rates in the approximately 2 - 83 [??l/min] and easily change the pressure. The micro pump could transport fluideven with the viscosity that is 400 times as large as that of water. Moreover, the micro pump could transport fluid withan energy consumption rate less than half those of the conventional micro pumps.
Vortex Cavitation from Baffle Plate and Pump Vibration in a Double-Suction Volute Pump
Sato, Toshiyuki,Nagahara, Takahide,Tanaka, Kazuhiro,Fuchiwaki, Masaki,Shimizu, Fumio,Inoue, Akira Korean Society for Fluid machinery 2011 International journal of fluid machinery and syste Vol.4 No.1
This study highlights especially the mechanism of vortex cavitation occurrence from the end of the suction duct in a double-suction volute pump and pump oscillation which causes cavitation noise from the pump. In this study, full 3D numerical simulations have been performed using a commercial code inside the pump from the inlet of suction duct to the outlet of delivery duct. The numerical model is based on a combination of multiphase flow equations with the truncated version of the Rayleigh-Plesset model predicting the complicated growth and collapse process of cavity bubbles. The experimental investigations have also been performed on the cavitating flow with flow visualization to evaluate the numerical results.