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디퓨져/노즐을 이용한 압전형 마이크로 펌프의 입ㆍ출구 형상 차이에 따른 유동특성에 관한 수치해석적 연구
김창녕(Chang Nyung Kim),김진욱(Chin Uck Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The present study has been carried out to investigate the pumping characteristics for different figures of inlet and outlet in diffuser/nozzle based on piezoelectric micropump. Piezoelectric micropump system consists of several parts like a pumping chamber, diffuser/nozzle, piezoelectric element and tubes. Parts of the micropump connected with diffuser/nozzle and tubes have been analyzed.. The magnified parts have been classified into two different models based on their resistance. These models have been further classified into six models with each one having three different angles at the magnified parts. Each model has been compared and analyzed using the simulation tool, namely, CFD- ACE depending on their flow rates and characteristics.
압전 구동방식 마이크로 펌프에서 기하학적 형상과 작동조건에 따른 펌핑특성에 대한 실험적 연구
용정권(Jung Kwon Yong),김창녕(Chang Nyung Kim),김진욱(Chin Uck Kim) 대한설비공학회 2009 설비공학 논문집 Vol.21 No.1
In the present experimental study, the pumping performances of diffuser/nozzle based piezoelectric micropumps are estimated with different operating factors and geometries. Here, the effects of the input voltage and frequency on the pumping performances have been examined together with the influences of the positions of the inlet and outlet. The results show that the flow rate of the micropump is larger with larger input voltage with the largest flow rates for the frequency to be close to 6.0 ㎐ all through the current experimental study. Also, it has been found that the positions of the inlet and outlet affect much on the performance of the piezoelectric micropumps. Error estimation has been carried out for the evaluation of the pumping performance in association with the uncertainty of the measurement.