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김국철(K.C. Kim),석진익(J.I. Suk),권희경(H.K. Kwon) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.11
A spent nuclear fuel cask should safe in the case of most severe accident loading during transportation. Therefore, in order to verify the integrity of the shipping cask manufactured by doosan heavy industries for the first time in Korea, rapid loading K1C tests has performed as material property evaluation. In this paper, the dynamic fracture toughness obtained by rapid loading K<SUB>IC</SUB> tests is discussed. The procedure of the integrity evaluation of the shipping cask is as follow: First, the maximum flaw size for the full area of forging product of the shipping cask is measured by nondestructive examination. Second, the dynamic fracture toughness test is carried out at -40℃. Third, FEM is performed for the model of the shipping cask with the maximum size flaw measured by NDE under seismic loading. Finally, the integrity of the shipping cask is evaluated by comparing maximum stress intensity factor calculated by FEM with dynamic fracture toughness measured by the experiment. In the integrity evaluation, our company has carried out nondestructive examination and dynamic fracture toughness test, and GNB Company in Germany has carried out FEM analysis. From the evaluation, the integrity of shipping cask was confirmed.
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김유일(Y.I. Kim),김귀순(K.S. Kim),김경천(K.C. Kim),하만영(M.Y. Ha),박호동(H.D. Park) 한국전산유체공학회 1995 한국전산유체공학회 학술대회논문집 Vol.1995 No.-
A computer code for solving the Reynolds averaged full Navier-Stokes equations has been developed for analysis of gas and steam turbine cascade flows with the option of using one of two types of turbulence model. One is the Baldwin-Lomax model and the other is standard k-ε model. The numerical integration is based on the explicit four stage Runge-Kutta scheme and finite volume method. To be verified, the resulting code is applied to VKI turbine cascade and compared with the previous experimental results. Finally, the flowfield around a steam turbine cascade is analyzed. Comparisons with experimental data show that present numerical scheme is an accurate Navier-Stokes solver and can give very good predictions for both gas and steam turbine cascade flow.
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