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김종규(J.K. Kim),김승현(S.H. Kim),이연상(Y.S. Lee),허강열(G.Y. Huh) 한국전산유체공학회 1997 한국전산유체공학회 학술대회논문집 Vol.1997 No.-
There is an increasing need for the ability to predict the turbulent flow, chemical reaction and heat transfer phenomena in furnaces and combustors and their performance as a function of the input and boundary conditions. Although a significant progress has been achieved in predictive modelling techniques, the shortcomings in certain modelling aspects highlight the lack of detailed information on the turbulent-combustion characteristics of the flow and radiation heat transfer. Detailed knowledge of the turbulent flow, flame characteristics and heat flux distributions is required in furnaces and combustors for high combustion efficiency and low pollutant emissions. In this paper, FLUENT 4.0 is applied to numerical analysis of the FHC-Ⅲ type swirl burner in No.2 Hot Mill Works of POSCO. The mixture fraction / PDF(Probability Density Function) approach with K-ε turbulent model is used for simulation of turbulent diffusion flames. The PI-model is applied to radiation heat transfer.
Pellet Semen 의 Glycerol 첨가방법과 평형시간이 한우의 정액성상과 수태에 미치는 영향
김종규,서국성,신원집,이용빈 ( J . K . Kim,G . S . Suh,W . J . Shin,Y . B . Lee ) 한국축산학회 1973 한국축산학회지 Vol.15 No.2
This experiment was conducted to study the possibility of pellet semen as a replacement for ampoule semen and simplifying the method of glycerol addition to the egg yolk extender with Korean native cattle. Glycerol was added once and twice to the egg yolk semen extender and equilibration time was 6, 12 and 18 hrs. respectively. Each semen was freezed in the liquid nitrogen and thawed in a 5℃ water bath. Inseminated artificially frozen semen to the cows and calculated the fertility (N.R. 60-90 days) and sperm living index. The results obtained are as follows: 1. No significant difference was found between once and twice additions of glycerol on the living index of spermatozoa. 2. No significant difference was found between, 6, 12 and 18 hours equilibration intervals on the living index of spermatozoa. 3. Conception rates in the Korean Native Cattle of pellet and ampoule semen were 55.1% and 59.2% respectively. The results indicated that conception rate of pellet semen was no better than the ampoule semen.
김명원(M.W.Kim),김종규(J.K.Kim) 한국해양환경·에너지학회 2012 한국해양환경·에너지학회 학술대회논문집 Vol.2012 No.11
섬진강 하구역의 해수유동 및 온배수 확산 특성을 현장관측과 3차원 수치모델(EFDC)을 이용하여 파악하였다. 섬진강 하구역의 해수유동 특성은 전반적으로 섬진강 유출량의 계절적 변동, 해수유동 구조 및 온배수 등에 의해 복잡한 형태를 보이는 것을 파악할 수 있었고, 이들 자료는 광양만 해양환경 변화 및 섬진강 하구역 관리의 기초자료로 사용될 수 있을 것으로 판단된다. In this study we try to identify the three-dimensional characteristics of Seomjin River discharges to consider their physical properties using seasonal field observation during spring tide and three-dimensional numerical modeling with EFDC(Environmental Fluid Dynamics Code). A EFDC and observed CTD data was used to predict the seasonal mixing behavior of Seomjin River and thermal discharges. The tidal elevation boundary conditions of the four main tidal harmonic(M2, S2, K1, O1) constituents on the open boundary and river discharges at the river boundary are considered in this study. The open boundary conditions are evaluated from the observation data of tide and tidal current near the open boundary. The circulation characteristics of Seomjin River discharges show well the three-dimensional tidal current and thermal effluents effect to the seasonal variation of river discharges.
김종규(J.K. Kim),조성훈(S.H. Cho),박일흠(I.H. Park) 한국해양환경·에너지학회 2004 한국해양환경공학회 학술대회논문집 Vol.2004 No.-
To get the maximum diffusion boundary of thermal effluent from Ha-Dong Thermal Power Plant, paths of TGPS Buoy and surface water temperature were obtained to 4 times at spring tide during 1 year. According to the paths of TGPS Buoy, the flumes of thermal effluent were moved about 25㎞ from outlet to Nand S direction in Gwangyang Bay. After 2-3 times of tidal period the waters were reached to Yosu Bay because the tidal current was predominant in that area. At the summer and winter season, a sudden drop of surface water temperature was detected around 3.5~4㎞ and 1.6~2㎞ radius from the outlet, respectively.
김종규(J.K. Kim),곽경일(G.I. Kwak),김명원(M.W. Kim) 한국해양환경·에너지학회 2006 한국해양환경·에너지학회 학술대회논문집 Vol.2006 No.-
본 연구는 광양만의 흥수기 전후의 표층온배수의 확산 특성을 고조, 중조 및 저조시의 CTD 관측자료분석을 통하여 온배수와 섬진강 담수 방류량의 변동에 따른 수평 및 연직구조로 파악하였다. 그 결과 광양만 표층온배수의 확산 특성은 전반적으로 해수 유동구조와 섬진강의 유출량, 그리고 하구역에 인접한 대단위 산업단지에서의 온배수에 의해 복잡한 형태를 파악할 수 있었다. A study on the spatial and temporal distributions of surface thermal effluents in Seomjin River estuary and Gwangyang Bay executed to grasp in 2005(July) and 2006(February, May, August, September). The distribution of surface thermal effluents during the spring tide show well the tidal current and thermal effluents effect to the expansion of Seomjin River discharges.