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정창균(C. G. Jung),박기철(K. C. Park),송연균(G. S. Song) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.5
A new coating steel such as a resin coated steel has been applying for various home appliances. The resin coated steel has different friction coefficients between the front and the back face. In this study, influence on formability by the different friction coefficients is investigated using numerical simulation.
정창균(C. G. Jung),박기철(K. C. Park) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Steel sheets with different coating layers on front and back such as Black Resin Coated Steel and UV Curable Resin Coated Steel have been developed to obtain high functionality of steel material. The formability of the steel sheets is changed because these steel sheets have different friction coefficients necessarily. In this paper, tensile, friction and FLD tests of the steel sheet with different coating layers on the each side have been performed and the results have been discussed to verify how to change the formability of the steel sheets.
다중 블록 격자를 이용한 원뿔 직관 모양의 벌류트 유동의 수치해석
배황(H. Bae),강현구(H.G. Kang),윤주식(J.S. Yoon),박기철(K.C. Park),장근식(K.S. Chang) 한국전산유체공학회 2006 한국전산유체공학회지 Vol.11 No.1
Numerical investigation of a centrifugal compressor volute having a modified straight conical duct has been made. Three-dimensional Reynolds-Averaged Navier-Stokes equations with k-ε turbulence equation are solved To avoid coordinate singularity at the central axis of the duct, multi-block H-type grid is generated on the circular cross-sections of the volute and stretched toward the solid wall boundary. We obtained numerical results with three different mass flow rates at the volute inlet, namely, with the inlet conditions that give small, medium and large mass flow rates at the outlet of the conical duct. Agreement with the experimental results is observed.