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전극형상에 따른 제조공기(I-Air)의 절연파괴 특성에 관한 연구
이창훈(C.H. Lee),김도석(D.S. Kim),常超(C. Chang),이창욱(C.W. Lee),김영수(Y.S. Kim),方亞偉(Y.W. Fang),최은혁(E.H. Choi),임창호(C.H. Lim),김정배 (J.B. Kim),이광식(K.S. Lee) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.11월
본 연구는 SF?를 대체하기 위한 제조공기(I-Air)의 특성을 연구할 목적으로 교류고전압 인가 시 압력(P)변화 및 갭 길이의 변화에 따른 절연파괴특성을 연구하였다. 본 연구를 통해 챔버 내의 P가 증가 할수록 절연파괴특성은 증가하는 것을 확인했다. 그리고 불평등전계 보다 평등전계에서 절연파괴특성이 더 증가하고 전극간거리(d)가 증가 할수록 절연파괴특성이 증가하는 것을 확인했다. 특히 평등전계에서 d 및 높은 P일수록 SF?의 절연파괴전압(V<SUB>B</SUB>)에 I-Air의 V<SUB>B</SUB>의 근접도가 큼을 알 수 있었다.
박재범(J.B.Park),이창욱(C.W.Lee),이종태(J.T.Lee) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
Hydrogen fueled engine with external mixture has higher thel1Tlal efficiency, but has lower power output than that of hydrogen engine with internal mixture. So, it is impossible to achieve high performance and efficiency simultaneously. In this study, dual injection hydrogen fueled engine which enables to obtain high performance and efficiency over all operating range is introduced. And, cycle and characteristics of this hydrogen engine were analysed in order to estimate the proposed hydrogen engine.<br/>
Blow-by 가스가 수소기관의 역화발생에 미치는 영향
김윤영(Y.Y.Kim),이창욱(C.W.Lee),이종태(J.T.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
Backfire limit equivalence ratio in hydrogen fueled engine with external mixture was investigated under changing of the amount of blow-by gas. As the results, it was found that the state of mixure in piston secondland and ring groove has effect on backfire occurrence, backfire limit equivalence ratio was extended by increasing the amount of blow-by gas.<br/>
정준규(J. K Jung),이정학(J. H. Lee),이창욱(C. W. Lee),서응렬(E. Y. Seo),박용종(Y. J. Park),권명근(M. K. Kwon) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.11
Recently, convection heat transfer has been implemented to commercial ovens to enhance heat and mass transfer. In addition to that, conduction and radiation are also closely bound to cooking performance of an oven. Nonetheless, many unknowns regarding cooking performance are yet present due to the lack of clear understanding on heat transfer mechanisms during oven cooking. In this study, particle image velocimetry(PIV) was employed to investigate the flow field, of an oven, in which convection plays a dominant role in heat and mass transfer. Various aspects of flow (stream wise an d cross - stream wise) were studied and compared to CFD results for further analysis, which will lay a groundwork on optimal design of a commercial oven.