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인듀서 입구각 변화가 자흡식 진공펌프 성능에 미치는 영향
김재원(Jae-Won Kim),서현석(Hyeon-Seok Seo),지효근(Hyo-Geun Ji),정윤근(Yoon-Keun Jung),김윤제(Youn-Jea Kim) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
Self-priming vacuum pump absorbs and transfers slurry by generating the internal vacuum pressure and the rotation of the impeller. Generating the internal vacuum pressure plays an important role in sucking the slurry at the inlet region of self-priming vacuum pump and it is mainly performed by the rotation of inducer. In this study, the hydraulic performance of self-priming vacuum pump was investigated with the changes of inducer inlet angle. Numerical analysis was also conducted under five different rotational speeds(2500, 2700, 2900, 3100 and 3300 RPM) by using commercial CFD code, ANSYS CFX. The results for mass flow rate, head and characteristic curve were prepared with various values of inducer angle.
마그네트론 스퍼터링 시스템의 방열 성능 향상에 관한 연구
백재상(Jae-Sang Baek),김태안(Tae-An Kim),김윤제(Youn-Jea Kim) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
Magnetron Sputtering system is used extensively for thin-film deposition to a wide variety of commercial and scientific purposes, such as making ultra-thin semiconductors, metal films, etc. It plays important role in a coating system. One of the problems to improve the performance of magnetron sputtering system is the enhancement of heat transfer at the source target. High voltage and electric current are furnished to the source target in order to get the uniform deposition. That energy is converted to heat, which must be removed by the efficient cooling system. Otherwise, it may damage the target, magnets, and substrate as well. Therefore, in order to maintain the uniform deposition, the design of effective cooling system is important. The main parameters affecting the cooling performance are the flow path of cooling water, inlet size and flow rate, etc. In this study, the flow characteristics of inside cooling system with various flow paths of cooling water and flow rates are investigated and results are graphically depicted.