Air-Water 모델에서 가시화를 통한 유동특성에 관한 연구 = A Study on the Flow Characteristics using Visualization in Air-Water Model

다국어 초록 (Multilingual Abstract)

In the air-water model, the characteristics of flow parameters were experimentally investigated. An electro-conductivity probe was used for measuring flow parameters such as local volume fraction and bubbles frequency. The flow parameters were very high at the near nozzle. For visualization of flow characteristics, a camera technique method and a thermo vision camera were adopted in the present study. The experimental results shows that the heat transfer from bubble surface to water is almost achieved within z=10［mm〕 from the nozzle. Then the temperature of bubble surface teaches to the water temperature in a short time. The camera and argon illumination laser were applied to the water circulation zone for flow visualization. The flow was more developed near the wall than at bubble-water plume. Voltex flow in the bottom region was relatively weaker than in the upper region.