Visualization experiment of complex flow field in a sphere-packed pipe by detailed PIV measurement |
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| Affiliation: | 1. Tohoku University, Sendai, Japan;2. Shiraz University, Shiraz, Iran;1. National Fusion Research Institute, Daejeon, Republic of Korea;2. Korea Atomic Energy Research Institute, Daejeon, Republic of Korea;1. Karlsruhe Institute of Technology (KIT), Institute for Neutron Physics and Reactor Technology (INR), Germany;2. Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM-WPT), Germany;3. Indian Institute of Technology Madras (IITM), Department of Mechanical Engineering, India;1. Korea Atomic Energy Research Institute, 989 Daeduck-daero, Yuseong-gu, Daejeon 305-353, Republic of Korea;2. National Fusion Research Institute, Gwahangno, Yuseong-gu, Daejeon 305-333, Republic of Korea;1. Graduate School of Science, Shizuoka University, Shizuoka, Japan;2. National Institute for Fusion Science, Gifu, Japan;3. Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka, Japan;4. Graduate School of Engineering, Hokkaido University, Sapporo, Japan;5. Department of Material Science, Shimane University, Matsue, Shimane, Japan;6. Hydrogen Isotope Research Center, University of Toyama, Toyama, Japan;1. CEA, DEN, Saclay, DM2S, SERMA, F-91191 Gif-sur-Yvette, France;2. Incka, 19-21 Rue du 8 mai 1945, F-94110 Arcueil, France;1. Korea Atomic Energy Research Institute, Republic of Korea;2. National Fusion Research Institute, Republic of Korea |
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| Abstract: | A sphere-packed pipe has been proposed as a heat transfer promoter for the first wall cooling in a Flibe blanket. In this study, the flow field in a sphere-packed pipe was well investigated by means of two-dimensional PIV method by matching refractive index of a channel material and working fluid. Three-dimensional flow structure was clarified by integrating the obtained data. The feature of the flow was tortuous high-velocity region formed near pebbles and large velocity fluctuation in the vicinity of the channel wall. And, to apply this flow structure to the actual first wall cooling, a new cooling system using finger-stacked structure was proposed and discussed. |
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| Keywords: | Flibe blanket Heat transfer enhancement Sphere-packed pipe Flow visualization |
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