http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
2차원(次元) 온돌 상난방(床煖房)시스템의 연도내 열유동(熱流動) 및 열전달(熱傳達) 수치해석(數値解析)
김영득,민만기,이상혁,김원갑,Kim, Y.D.,Min, M.K.,Lee, S.H.,Kim, W.K. 대한설비공학회 1994 설비공학 논문집 Vol.6 No.4
Numerical analysis was applied to a simplified two-dimensional Ondol heating model which consists of heating space on the top of it along with radiant and convective heating floor panel, flue channel in the midway and rectangular underground soil region at the bottom. These three components constitute a system thermally coupled at the top and bottom interfaces of the flue channel. Investigated in the present paper are effects with variations of the Reynolds numbers of 100, 200, and 300, Grashof numbers of $0.1{\times}10^6$ and $0.3{\times}10^6$ and aspect ratios of 15 and 20 on the heat transfer and fluid flow characteristics of two-dimensional Ondol heating model by computer simulation.
저온(低溫)가스 연돌의 보온이 연돌의 최적높이에 미치는 영향
김영득,민만기,Kim, Y.D.,Min, M.K. 대한설비공학회 1990 설비공학 논문집 Vol.2 No.3
This paper presents that in the Korean Ondol Heating System using hard coal as an usual fuel, what effects an insulation of chimney with the low temperature gas flow has on the optimum chimney height which gives a maximum gas weight flow rate under the general weather data and actual design condition of chimney is compared with the bared chimney and studied. And also, the effects of chimney materials and diameter, dimensionless temperature difference, insulating materials and thickness which have on the optimum chimney height were researched and a good results increasing a maximum gas weight flowrate is obtained by insulating the chimney.
오스테나이트계 고질소강의 열간성형특성 분석 및 리테이닝링의 강도예측기술
김영득(K Y. D. Kim),이종욱(J. W. Lee),조종래(J. R. Cho) 한국소성가공학회 2014 한국소성가공학회 학술대회 논문집 Vol.2014 No.10
Austenite-phase high nitrogen steel was multiply applied to industry field owing to high-strength, high-ductility and eco-friendly material properties. Whereas, it has a lot of deformation difficulties such as thermal degradation characteristics and high elapsed deformation load in case of deformation process. In this study, we analyzed about hot deformation property with 18Mn18Cr high nitrogen steel material and derived optimization forging temperature & strain condition for good forgings. Also, In case of retaining ring manufacturing for power plant, we suggested the predictable equation of material strength through analysis of Lab. scale experiment & FE simulation. The results was verified through the application of actual size manufacturing process.