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압축공기시스템 에너지 절약을 위한 servo valve의 유동해석
박홍범(H. B. Park),성형진(H. J. Sung),류동렬(D. R. Ryu),김영석(Y. S. Kim) 유공압건설기계학회 2008 유공압건설기계학회 학술대회논문집 Vol.2008 No.10
In this paper, analysis of pressure and flow characteristics have been performed with a servo valve. A number of servo valve have been used in various applications including the inserting device, bearing transportation and welding machine. By analysis of flow and pressure gradient, technology can be obtained about optimal simulation of high response servo for competitiveness. Spool displacement and ratio of inlet/outlet pressure can give big effects to flow and pressure inside servo valve.
연구용 원자로의 decay tank 내부 구조물 설계를 위한 해석
서경우(K. W. Seo),박홍범(H. B. Park),윤현기(H .G. Yoon),김성훈(S. H. Kim),지대영(D. Y. Chi) 한국전산유체공학회 2014 한국전산유체공학회 학술대회논문집 Vol.2014 No.5
The primary coolant after passing through the reactor core contains many kinds of radio-nuclides, especially N-16 for a research reactor. The decay tank including internal structures is designed to provide enough transit time to ensure that the N-16 activity decreases before the coolant leaves the decay tank’s shielding room. To design the decay tank, the flow and pressure distributions were calculated using the commercially available CFD code, ANSYS-CFD. The cell modeling was performed to supply the conservative input for the stress analysis. The CFD results showed that the stress was concentrated near the center of the first perforated plate by the flow induced from the inlet. The pressure loss between the inlet and outlet of the decay tank will be used for the design of the pump and the primary cooling system.