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        수평 2열 원통관 주위의 동결형상에 관한 연구

        윤정인,김재돌,도요후미 카토,오후규,Yoon, J.I.,Kim, J.D.,Toyofumi, Kato,Oh, H.K. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.1

        Experimental study was performed for free convection and ice formation around two horizontal circular tubes which were placed vertically. Temperature and velocity distributions were visualized with real time holographic interferometry technique and tracer method. When water was cooled, super cooled region was formed around cooling pipe. It was found that flow induced by free convection always directed downwards when the coolant temperature was low, while it directed upwards when the coolant temperature was comparably high though it directed downwards initially. Flow phenomena with free convection were investigated in detail with varying cooling rate and length between cooling pipes. And growing process of dense ice was also investigated. Dendritic ice is suddenly formed within a supercooled region, and a dense ice layer begins to develop from the cooling wall.

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