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RISS 인기검색어
- 검색키워드
- 주제어 : Thermo vision camera (검색결과 2 건)
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A Study on the Characteristics of Two-Phase Flow by Driven Bubbles in a Liquid Bath
Oh, Yool-Kwon,Seo, Dong-Pyo The Society of Air-Conditioning and Refrigerating 2005 International Journal Of Air-Conditioning and Refr Vol.13 No.1
In the present study, the characteristics of upward bubble flow were experimentally investigated in a liquid bath. An electro-conductivity probe was used to measure local volume fraction and bubble frequency. Since the gas was concentrated at the near the nozzle, the flow parameters were high near the nozzle. In general their axial and radial values tended to decrease with increasing distance. For visualization of flow characteristics, a Particle Image Velocimetry (PIV) and a thermo-vision camera were used in the present study. The experimental results showed that heat transfer from bubble surface to water was largely completed within z = 10 mm from the nozzle, and then the temperature of bubble surface reached that of water rapidly. Due to the centrifugal force, the flow was more developed near the wall than at bubble-water plume. Vortex flow in the bottom region was relatively weaker than that in the upper region.
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Air-Water 모델에서 가시화를 통한 유동특성에 관한 연구
임태훈,박근욱,서동표,정낙규,김진흥,오율권 朝鮮大學校 機械技術硏究所 2002 機械技術硏究 Vol.5 No.2
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.
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