正四角덕트의 90°分岐管內 流動特性에 관한 實驗的 硏究 = (An) experimental study in the flow characteristics in 90˚branching pipe with a square duct

다국어 초록 (Multilingual Abstract)

Heat engine and fluid machinery in the plant have to linked with various ducts net and the corresponding design have to be concerned about effectiveness and stability of system of plant. To optimum control and design system concerning stability, economization, operating effectiveness, we have to exactly analysis flow properties of duct applying to fluid machinery, heat exchanger, cooling machine, air conditioning equipment.
Therefore, it is necessary to research the duct, heat transfer equipment, for increasing overall effectiveness of air conditioning system by suggesting basic data of duct resulting from organic research. So we can contribute to technical developement of duct.
According to the experiment on working properties, we can conclude as followings
1) The flow from the upstream of main duct outflows toward the branch duct after carring out complicated vortex flow, but the flow appearance is extremely complex. The flux of branch duct passed by about 20% of straight duct flux and others, 80% flux of straight duct, passed by through the main duct.
2) In case of speeding up the flow velocity of the duct, lots of wave velocity component is occured, the value of wave velocity component is large by the mixture of two boundary layers resulting from developing the boundary layer at both walls of duct.

목차 (Table of Contents)

• 목차 = ⅰ
• List of Figures = ⅲ
• List of Photographs = ⅳ
• List of Tables = ⅴ
• Abstract = ⅵ
• Ⅰ. 序論 = 1
• Ⅰ-1. 硏究의 背景 = 1
• Ⅰ-2. 硏究의 目的 및 內容 = 3
• Ⅱ. 理論解析 = 5
• Ⅲ. 實驗 = 9
• Ⅲ-1. 實驗 裝置 = 9
• Ⅲ-1-1. 試驗 덕트 = 10
• Ⅲ-1-2. 3次元 移送裝置 (3-Dimensional Traverse System) = 10
• Ⅲ-1-3. 送風機 (Blower) = 11
• Ⅲ-1-4. 測定器 = 16
• Ⅲ-1-5. 變換機 (A/D Converter) = 17
• Ⅲ-1-6. 電源供給裝置 = 22
• Ⅲ-2. 實驗 方法 = 23
• Ⅳ. 結果 및 考察 = 25
• Ⅴ. 結論 = 45
• Reference = 46