분기관의 흡입관 각도 변화에 대한 유동특성 연구 = A Study on the Flow Characteristics a Divided Pipe by Inclined Suction Pipe

다국어 초록 (Multilingual Abstract)

A divided pipe is a fluid delivery device which spouts fluid of high pressure from a driving pipe and absorbs fluid of high pressure whose pressure is increased through exchange of momentum with surrounding gas of low pressure. As it has no mechanical movement, failure is rarely found. A divided pipe can be easily constructed and installed regardless of size of systems, also easily used at the places involved in fluid and have little need of maintenance, and its expense is reasonable. Therefore, this study aims at presenting basic data to apply the whole divided pipe that will be used for mechanical devices or constructional equipments as alternative devices of pumps or mechanical devices instead of simple compression or vacuuming device. For the purpose, it presents optimization design by analysing what can not be obtained through experiments to evaluate improved or new performance of the device, analyses general contents of flow by acquiring exact test data on specific interpretative areas using more advanced experimental techniques, and identifies flow characteristics of divided pipe by examining validity of experiments using computer hydrodynamics to demonstrate the experiment. (1) We define the highest fluid efficiency case for the suction pipe of angle at 45°. (2) At 45°, the static pressure distribution, had negative value, and it was found that eddy flow increased due to increased absorption speed, this study suggests that the condition of curvature design for absorption tube in respect to further speed conditions should be considered important. (3) In respect to static pressure distribution, this study found that negative pressure occurred at rounded part of the branch duct. It is assumed that when the fluid was absorbed from the absorption tube to the expanded duct, the points attached by eddy flow were found due to it`s speed direction change.