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영상처리 기법을 이용한 원통형 용기내의 회전유속의 측정
김재원,엄정섭,임태규,Kim, J.W.,Eum, C.S.,Lim, T.G. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.1
An experimental investigation has been made for flow in a circular cylinder with a rotating bottom disk. Flow system considered in this paper is a characteristic model of interior flows of an electric washing machine. Flows in a tub of an electric washing machine are driven by a rotating bottom disk called a pulsator. The simple and characteristic model was composed of a circular cylinder with impulsively rotating endwall disk and a viscous fluid in it. Rotational motion of the pulsator is periodic and alternative in rotation direction. The flow field in the interior region is governed by a horizontal boundary layer forms on the impulsively rotating disk. Experimental approach was accomplished by adopting an image processing technique for velocity measurements. Comprehensive details of the flow structure are presented. Also a meridional circulation is obtained by tracking image particles suspended in the fluid. Flow structure and data are successfully procured for this complex rotating flow field.
원통형 입자에 따른 관내 차압 전산 해석 및 Ergun식 보정 연구
유승영(S.Y Yoo),임태규(T.G. Lim),이상복(S.B. Lee),노태성(T.S. Roh) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
In this study, Pressure drops in a pipe according to cylinderical particle that has been calculated and analyzed. In general, it is used in a interior ballistic cylindrical particle shape. The analysis of 10 cases for Reynolds number has been conducted in 3 cases cylindrical particle. The results have been compared to the Erguns empirical equation which predicts pressure drop in pipe. To reduce difference between the Erguns empirical equation and the numerical results, calibration has been conducted.