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주성국(Ju Seong-Guk),전병권(Jun Byung-Kweon) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(계획계)
This study investigated the physical environment of urban residential areas that are rapidly disappearing in Seoul, concentrating on the area of No. 9 neighborhood of Ihwa-dong, Jongro-gu, Seoul, in order to trace its changing trend. By analyzing the formation and transformation processes of modern urban residential areas, we will be able to see how urban residential areas of Korea have changed in time.
충돌제트가 분사되는 내부냉각통로에서의 3차원 유동특성 및 압력손실
주성국,이상우 國立金烏工科大學校附設生産技術硏究所 1997 産業技術開發硏究 Vol.13 No.-
Detailed three-demensional flow measurements and aerodynamic loss distributions inside internal cooling passage with jet impingement cooling are presented using five-hole probe. For a fixed inclination angle of 90 deg, the velocity ratio of the jets to free-stream is varied from 1.0 to 4.0. Results show that for low velocity ratio, a pair of conunterrotating vortices were presented, but high velocity ratios it was disappeared. It also show that aerodynamic losses were closely related to the secondary flow. In the case of the velocity ratio of 2.0, the secondary flow is the largest. Regardless of the velocity ratios, aerodynamic losses are decreased in rear region far from the jet injection hole.
이상우,주성국,Lee, Sang-U,Ju, Seong-Guk 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.9
Three-dimensional flow within a film-cooling hole, which is normally oriented to the main flow, has been measured by using a straight five-hole probe for the blowing ratios of 1.0 and 2.0. The length-to-diameter ratio of the injection hole is fixed to be 1.0 throughout the whole experiments. The result shows that the secondary flow within the hole is strongly affected by the main flow and flow separation at the hole inlet. The higher blowing ratio provides less influence of the main flow on the injectant flow. The three-dimensional flow at the hole exit is considerably altered due to the strong interaction between the injectant and main flow. The aerodynamic loss produced inside the injection hole is mainly attributed to the inlet flow separation.
분사구멍의 길이가 수직 분사구멍 내부에서의 3차원 유동에 미치는 영향
이상우,주성국,Lee, Sang Woo,Joo, Seong Kuk 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.9
Effects of a length-to-diameter ratio, L/D, on the three-dimensional flow and aerodynamic loss within an injection hole, which is normally oriented to the mainflow, have been investigated by using a straight five-hole probe. The length-to-diameter ratio of the injection hole is varied to be 0.5 and 2.0 for blowing ratios of 0.5, 1.0 and 2.0. Regardless of the blowing ratio, flows within the hole and at the jet exit are strongly affected by the length-to-diameter ratio. In the case of L/D=0.5, the inside flow is considerably influenced by the mainflow, and the exit flow variation is found to be the greatest. The aerodynamic loss in this case is usually attributed to jet -mainflow interactions. In the case of L/D=2.0, the flow separation and reattachment in the inlet region are completely separated from the complicated exit flow, and the aerodynamic-loss production is mainly due to the inlet flow separation.