http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이종철(Jong-Chul Lee),최종웅(Jongung Choi),강성모(Sung-Mo Kang),김윤제(Youn-Jea Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
The flow analysis is needed to verify the physical phenomena through interruption processes for<br/> improving the capacity and the reliability of gas circuit breakers. Moreover the small current interruption<br/> performance of GCBs could be predicted by coupling the flow characteristics with the electric field one. In<br/> this paper, the unsteady flow characteristics and the traveling trajectory are depicted with a commercial CFD<br/> code, PHOENICS, programmed for moving motion of objects. In order to validate computational results, the<br/> measured pressure data in cylinder and in front of arcing contact are compared with the test results of small<br/> current interruption.
CFD를 이용한 SF6 가스차단기의 SLF차단성능에 관한 수치적 연구
안희섭(Ahn Heui Sub),최종웅(Jongung Choi),박석원(Seokweon Park) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
A numerical model on the current interruption of SLF(Short Line Fault) is described in this paper. This modeling takes into account the turbulent effects and radiation of arc based on the LTE(Local Thermal Equilibrium) and LCE(Local Chemical Equibrium) assumptions. The arc conductivity and PAC(Post Arc Current) around the current zero is predicted and compared with test results.
A Study on the Backward Extrusion of Internal Spline
YongIl Cho(조용일),JongUng Choi(최종웅),Yuangen Qiu(추연근),Heayong Cho(조해용) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.9
Spline is a machine component using transmits rotating energy with grooves on internal of boss and external periphery of shaft. Internal spline is generally produced by machining process. However, to reduce manufacturing cost and save time, plastic deformation process such as backward extrusion is gradually adapted for spline production. In plastic deformation process, forming load, stress on tools and flow flaws should be taken into account to have sound products. For this purpose, kinematically admissible velocity fields for Upper Bound Method in backward extrusion of internal spline has been suggested, then forming load and relative pressure have been calculated. Internal spline forming experiments have been con-ucted under hydraulic press and the calculated forming load well predicts the load of experiment.