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조대진(Cho Dae-Jin),윤석주(Yoon Suck-Ju) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
This study is mainly investigated on the spray characteristics of the pressure swirl atomizer with the variation of orifice diameter and swirl inlet port number.<br/> Four atomizers with the different orifice diameter and five swirl inlet port with the different inlet number were designed. For the purpose of the measurement of the mean drop size. Malvern particle sizer was used. And discharge coefficient and spray cone angle were measured.<br/> As a result. dominant factor which have influence on the spray characteristics of pressure swirl atomizer was orifice diameter.<br/>
천성철(Chun Sung-Chul),조대진(Cho Dae-Jin),우성우(Woo Sung-Woo),최장호(Choi Jang-Ho),정재오(Jung Jae-O),고한명(Ko Han-Myung) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.4
Life styles of occupants may change during whole life of an apartment as the lifetime of the building gets longer. Therefore, spatial flexibility in apartments becomes more important. New structural systems and architectural plans should be developed to meet requirements of spatial flexibility. The Ministry of Construction and Transportation (MOCT) recently stipulated several special regulations regarding spatial flexibility and encouraged a flat plate system instead of a shear wall system by providing incentive for the upper limit of prices and floor space indices of apartments. In this paper, a flat plate system with edge beams is developed to replace a shear wall system for conventional apartments. A shear wall system has been optimized for apartments in Korea. The applicability and the construction cost of a new developed structural system with advanced spatial flexibility should be investigated compared with the shear wall system. To assess the construction cost and the applicability of the flat plate system, total 24 buildings are designed and the costs are evaluated. Two types of plans (tower and rectangular) and two kinds of space (110m2 and 140m2) are selected. The buildings have three kinds of stories, 15, 25 and 35 (30 stories for rectangular type). Buildings with a flat plate system are designed to have similar structural performance to buildings with a shear wall system. The total costs of structural frames and dry walls for partitions are evaluated for the proposed flat plate system with varying stories, types, and size of houses. The results of this research can be used in determining feasibility of residential projects.
이재호(Jai-Ho Lee),김범준(Bum-Jun Kim),신장근(Jang-Kuen Shin),조대진(Dae-Jin Cho),윤석주(Suck-Ju Yoon) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The flow analysis of a rectangular duet with blockages was performed by a ST AR-CD which is a commercial computational fluid dynamics program and through SIMPLE(Semi Implicit Method for Pressure Linked Equations) algorithm and finite volume method performed in the case of 3-D, incompressible. turbulent flow. The standard κ - ε model and wall function method were used for analysis of turbulent fluid flow. The computed velocity profiled according to variation of Reynolds number and blockages position in a rectangular duct show that flow distribution at duct outlet is improved by modifying the area of rectangular duct with blockages.<br/>