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고압상태에서의 디젤연료분무의 연소 및 매연가스배출 특성
권영동(Y.D. Kwon),김용모(Y.M. Kim),김세원(S.W.Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
The present study is focused on the combustion characteristics of a Diesel spray in the high-pressure environment, The primary and secondary atomization is modelled using the wave instability breakup model and autoignition process of a Diesel spray is represented by the Shell ignition model Soot formation is kinetically controlled and soot oxidation is modeled to account for surface chemistry. The NOx formation is based on the extended ZeIdovich NOx model Numerical results indicate that the elevated pressure of combustion chamber significantly influences the soot/NOx emission as well as the overall combustion processes.<br/> <br/>
직접분사식 디젤엔진의 매연가스 배출특성과 엔진성능에 미치는 분사압력의 영향
김용모(Y.M. Kim),권영동(Y.D. Kwon),김세원(S.W. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
The effects of injection pressure on pollutant formation and performance in DI diesel engine are numerically investigated. The primary and secondary atomization is modelled using the wave instability breakup model and drop-wall interaction process is modelled using the Stick model and the modified Jet impingement model. Compared to the Stick model, the modified Jet model significantly improves the predicative capability in terms of chamber pressure and heat release rate in the DI Diesel engines. Numerical results indicate that soot emissions decrease by increasing the injection pressure. However, increase in the injection pressure beyond a certain level does not improve the soot and NO. emission trade-off significantly.<br/>
김용모(Y.M.Kim),권영동(Y.D.Kwon),김후중(H.J.Kim),김세원(S.W.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
The autoignition and combustion processes of a diesel spray are numerically studied. To simulate the autoignition and the combustion process in a diesel spray, the wave instability breakup model, the Shell ignition model, and the modified eddy breakup model are implemented in the KIVA-Ⅱ code. The coupling mechanism between fluid mechanics and chemical reaction associated with autoignition is discussed in detail. Numerical results indicate that the mixing process along the edges of spray jet has a crucial role for autoignition and combustion process. We also investigate effects of injection pressure and concentration of O₂ and CO₂ on the autoignition process in the diesel/EGR environment.<br/>
인삼류(홍삼, 백삼) 제조·가공업체의 미생물 오염도 조사
심원보,이채원,최영동,박상곤,정명진,김정숙,김세리,박기환,정덕화 한국식품위생안전성학회 2015 한국식품위생안전성학회지 Vol.30 No.2
The aim of this study was to investigate microbiological contamination levels in the manufacturing company of ginseng products (white and red ginseng). Firstly, the contamination level for ginseng and each stage ginseng were 1.8~4.9 log CFU/g (total bacteria), 1.2~3.0 log CFU/g (coliform), 0.8~4.1 log CFU/g (fungi). However, only Bacillus cereus among pathogenic bacteria was detected from a few sample. The contamination of total bacteria tended to decrease as ginseng was being processing. Therefore, that of finished products (white and red ginseng) showed the lowest contamination level among each stage ginseng sample. That of fungi decreased steadily, although the contamination of fungi has tended to increase right after ginseng was steamed. Secondly, the contamination level for working tools and facilities were 1.7~4.7 log CFU/cm2 (total bacteria), 0.4~4.0 log CFU/cm2 (coliform), 0.9~4.2 log CFU/cm2 (fungi). Especially, washing and peeling machines were higher contamination level. Finally, the contamination level of worker who washed and steamed ginseng was higher than worker who shaped, sorted and stored ginseng. Also, Staphylococus aureus was detected at 0.2~0.7 log CFU/hand on some wokers’ hands. These results showed proper heating condition (temperature and time) and tidy manufacturing facility are the most important to avoid developing any microbiological problem of Ginseng Products.
약학박사 정 시련 교수 정년퇴임 기념호 : 연구논문(재록) ; 생명과학 : Rutaecarpine의 면역독성 연구
전태원 ( Tae Won Jeon ),김춘화 ( Chun Hua Jin ),이상규 ( Sang Kyu Lee ),전인혜 ( In Hye Jun ),김기환 ( Ghee Hwan Kim ),이동주 ( Dong Ju Lee ),정혜광 ( Hye Gwang Jeong ),이경복 ( Kyung Bok Lee ),장영동 ( Yurng Dong Jahng ),정태천 ( 영남대학교 약품개발연구소 2006 영남대학교 약품개발연구소 연구업적집 Vol.16 No.-