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3포트 ER 밸브 개발을 위한 분산계 ER유체의 유동특성에 관한 연구
장문제,장성철,염만오,이동극,김기홍 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
The purpose of the present study is to examine the flow characteristics of ER fluids between 2 port and 3 port rectangular tube brass electrodes. ER fluid is made silicon oil mixed with 2-3wt% starch having hydrous particles. Flow visualization of the ER fluids were obtained by CCD camera measuring those of the clusters using an image processing technique. This research found the flow rate(Q_(L)) with 0 kV/mm, 0.5kV/mm and 1.0kV/mm for Q_(L) = 0, 0 and 5.73cm³/s. When the strength of the electric field increased, the cluster of ER fluids are clearly strong along the rectangular tube and the flow rate(Q) decreased.
ER밸브 개발을 위한 3포트 4각 튜브내에서 ER유체의 유동가시화에 관한 연구
장문제(Munjey Jang),장성철(Sungcheol Jang),염만오(Manoh Yum),김도태(Dotae Kim),김기홍(Kihong Kim) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
The purpose of this study is to visualize the characteristics of ER fluids as preceding step of developing 3 port ER valves. ER fluids are made with silicone oil and 3 weight percent starch having hydrous particles. The flow visualization of ER fluids flow is obtained by CCD camera with changing the strength of electric field to ER fluids flow. As the strength of the electric field increases, more clustors in flow are made and these clusters are thought to be the reasons of the load flow rate being increaed and the outlet flow rate being decreased.