Traditionally, the flow regime in two phase flow in rod bundles are considered in a global sense by the visualization. However, a sub-channel flow regime is required to understand and model the two phase flow structures in rod bundles. In this work, a sub-channel impedance meter was designed to get the dynamic feature in the sub-channels, which was applied to identify the sub-channel flow regime by the fast search and finding peaks of the cumulative probability distribution functions (CPDFs) objectively. In the present study, five flow regimes, namely bubbly flow, quasi-cap bubbly flow, quasi-slug flow, cap-turbulent flow and churn-turbulent flow were defined and recognized. The sub-channel flow regimes at the same cross section were compared to each other, which show similar feature with the local flow regimes in pipe. It is possible to identify nine different global flow regime configurations by combining the corner, side and inner sub-channel flow regime at the same cross section, which was drawn in the 2D sub-channel flow regime.
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2017 25th International Conference on Nuclear Engineering
July 2–6, 2017
Shanghai, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5787-8
PROCEEDINGS PAPER
Experimental Study of the Sub-Channel Flow Regimes in 5×5 Rod Bundles With Simplified Grid Spacer Available to Purchase
Quanyao Ren,
Quanyao Ren
Chongqing University, Chongqing, China
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Wenxiong Zhou,
Wenxiong Zhou
Chongqing University, Chongqing, China
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Liangming Pan,
Liangming Pan
Chongqing University, Chongqing, China
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Tingpu Ye,
Tingpu Ye
Chongqing University, Chongqing, China
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Songsong Li
Songsong Li
Chongqing University, Chongqing, China
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Quanyao Ren
Chongqing University, Chongqing, China
Wenxiong Zhou
Chongqing University, Chongqing, China
Liangming Pan
Chongqing University, Chongqing, China
Hang Liu
Chongqing University, Chongqing, China
Bin Yu
Chongqing University, Chongqing, China
Tingpu Ye
Chongqing University, Chongqing, China
Songsong Li
Chongqing University, Chongqing, China
Paper No:
ICONE25-66819, V009T15A021; 7 pages
Published Online:
October 17, 2017
Citation
Ren, Q, Zhou, W, Pan, L, Liu, H, Yu, B, Ye, T, & Li, S. "Experimental Study of the Sub-Channel Flow Regimes in 5×5 Rod Bundles With Simplified Grid Spacer." Proceedings of the 2017 25th International Conference on Nuclear Engineering. Volume 9: Student Paper Competition. Shanghai, China. July 2–6, 2017. V009T15A021. ASME. https://doi.org/10.1115/ICONE25-66819
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