標題: A Comparative Study of Nozzle/Diffuser Micropumps with Novel Valves
作者: Yang, Kai-Shing
Chao, Tzu-Feng
Chen, Ing Youn
Wang, Chi-Chuan
Shyu, Jin-Cherng
機械工程學系
Department of Mechanical Engineering
關鍵字: micro pump;diffusers;nozzles;enhancement;flow rate
公開日期: 1-Feb-2012
摘要: This study conducts an experimental study concerning the improvement of nozzle/diffuser micropump design using some novel no-moving-part valves. A total of three micropumps, including two enhancement structures having two-fin or obstacle structure and one conventional micro nozzle/diffuser design, are made and tested in this study. It is found that dramatic increase of the pressure drops across the designed micro nozzles/diffusers are seen when the obstacle or fin structure is added. The resultant maximum flow rates are 47.07 mm(3)/s and 53.39 mm(3)/s, respectively, for the conventional micro nozzle/diffuser and the added two-fin structure in micro nozzle/diffuser operated at a frequency of 400 Hz. Yet the mass flow rate for two-fin design surpasses that of conventional one when the frequency is below 425 Hz but the trend is reversed with a further increase of frequency. This is because the maximum efficiency ratio improvement for added two-fin is appreciably higher than the other design at a lower operating frequency. In the meantime, despite the efficiency ratio of the obstacle structure also reveals a similar trend as that of two-fin design, its significant pressure drop (flow resistance) had offset its superiority at low operating frequency, thereby leading to a lesser flow rate throughout the test range.
URI: http://dx.doi.org/10.3390/molecules17022178
http://hdl.handle.net/11536/15655
ISSN: 1420-3049
DOI: 10.3390/molecules17022178
期刊: MOLECULES
Volume: 17
Issue: 2
起始頁: 2178
結束頁: 2187
Appears in Collections:Articles


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