http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김명배(Myungbae Kim),도규형(Kyuhyung Do),최병일(Byungil Choi),한용식(Yongshik Han),이유환(Yuwhan Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In the present work the second-order perturbation solutions of the simple physical model for liquid pool spreading are obtained for the case of continuous spill. To generalize the solution governing equations are non-dimensionalized and major dimensionless variables are identified. The second-order solutions improve the first-order solution for the pool volume.
김명배(Myungbae Kim),도규형(Kyuhyung Do),한용식(Yongshik Han),최병일(Byungil Choi) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.40
In the present work the equations of the simple physical model with vaporization are solved semi-analytically for the first time using mathematical method called perturbation techniques. We use an evaporation rate per unit area as a perturbation parameter, and first order solutions are obtained for continuous and instantaneous release.
김명배(Myungbae Kim),도규형(Kyuhyung Do),한용식(Yongshik Han),최병일(Byungil Choi) 대한기계학회 2011 大韓機械學會論文集B Vol.35 No.3
증발하면서 원형으로 퍼져가고 있는 액체에 대한 모델을 지배하는 연립 상미분 방정식은 지금까지 수치해석적인 방법으로 풀어 왔는데 본 연구에서 섭동해를 최초로 구하였다. 액체의 순간적인 누출과 연속적인 누출에 대하여 섭동 변수로써 단위면적 당 증발률을 사용하여 1차항까지 섭동해를 구하였다. 1차 섭동해의 계산 결과 풀의 부피에 대하여 초기에는 수치해와 잘 일치 하였으나 후기에는 약간의 차이가 존재하였으며 풀의 반경에 대하여는 두가지 종류의 해가 거의 일치 하였다. We solve the simple physical model for liquid pool spreading with vaporization semi-analytically for the first time, using perturbation techniques. The results are compared with those obtained using numerical methods. We use the evaporation rate per unit area as a perturbation parameter, and first-order solutions are obtained for continuous and instantaneous release. The two solutions are nearly identical with respect to the pool radius. The pool volumes are nearly the same at the early stage of the spread and then start to diverge.
유화롱(HWALONG YOU),최병일(BYUNGIL CHOI),도규형(KYUHYUNG DO),김태훈(TAEHOON KIM),김창현(CHANGHYUN KIM),김민창(MINCHANG KIM),한용식(YONGSHIK HAN) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.6
This study analyzes the cool-down process of liquid hydrogen storage tanks, which have advantages in terms of large-capacity transfer, storage, and utilization as hydrogen demand increases. A hydrogen liquefaction plant is selected for analysis and an efficient tank cooling method is sought by comparing the time required for the cool-down process with the gas consumption in connection with the gassing-up process required for the operation of the liquid hydrogen storage tank. The results of this study can be referred to in the operation process after the initial start-up and maintenance of the hydrogen liquefaction plant.