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강릉지역 축우 Bovine Virus Diarrhea 발생보고
배상호,오명호,김홍집,정운익,김병한,이재진,Bae S.H.,Oh M.H.,Kim J.J.,Chung U.I,Kim B.H.,Lee J.J 대한수의사회 1994 대한수의사회지 Vol.30 No.6
The clinical sign, hematoligy blood chemistry, virology(direct FA and virus recovery) and serum nutralization test for 6 dairy cows which had reared in Kangrung, Kangwon-Do, Korea carried out, and 4 out of them were decided to be infected with Bovine Viru
천연가스 예혼합화염의 연소특성 및 축소반응메커니즘에 관한 연구
이수룡(S. R. Lee),김홍집(H. J. Kim),정석호(S. H. Chung) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.4
Combustion characteristics of natural gas premixed flames is studied experimently and numerically by adopting a counterflow as a flamelet model in turbulent flames. Flame speeds are measured by employing LDV, and the results show that flame speed increases linearly with strain rate, which agrees well with numerical results. Parametric dependences of extinction strain rates are studied numerically with detailed kinetic mechanism to show that the addition of ethane to a methane premixed flame makes the flame more resistant to strain rate. The effect of pressure on the extinction strain rate is that the extinction strain rate increases up to 10 atm and then decreases, which is explained by competition of chain branching H +O₂=OH +0 and recombination reaction H +O₂ +M=HO₂ +M. Detailed mechanism having seventy-four step is systematically reduced to a nine-step and a five-step mechanisms while five-step thermal NOx chemistry is reduced to two-step. Comparison between the results of the detailed and the reduced mechanisms demonstrates that the reduced mechanism successfully describes the essential features of natural gas premixed flames including extinction strain rate and NOx production.