In this study, the characteristic of the swirling flow was analyzed in detail in terms of flow field by means of a visualization experiment using matched refractive index PIV measurement to evaluate the applicability of the swirling flow generated downstream of a three-dimensionally connected dual elbow to the divertor cooling. The dual elbow used in the experiment comprises two 90-degree elbows with the same curvature connected directly in three-dimensional configuration. From the experiment, it was found that strong swirling velocity component appears locally near the pipe wall downstream of the second elbow. Moreover, although the strength of the swirling flow changed gradually as it flowed downstream, it attenuated little even 8D downstream of the dual elbow, where D was the diameter of the piping. Therefore, this swirling flow is expected to survive for a considerable distance downstream of the elbow, and the applicability of this flow field to divertor cooling can be promising. Furthermore turbulence quantities such as Reynolds stress were analyzed in terms of heat transfer performance. Since there were some regions where larger Reynolds stress than a developed turbulent pipe flow was observed near the pipe wall, high heat transfer is expected there.
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2013 21st International Conference on Nuclear Engineering
July 29–August 2, 2013
Chengdu, China
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5582-9
PROCEEDINGS PAPER
Feasibility Study on Application of a Self-Formed Flow Field Downstream of Elbows to Divertor Cooling
Shoichi Kodate,
Shoichi Kodate
Tohoku University, Sendai, Miyagi, Japan
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Tatsuya Kubo,
Tatsuya Kubo
Tohoku University, Sendai, Miyagi, Japan
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Shinji Ebara,
Shinji Ebara
Tohoku University, Sendai, Miyagi, Japan
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Hidetoshi Hashizume
Hidetoshi Hashizume
Tohoku University, Sendai, Miyagi, Japan
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Shoichi Kodate
Tohoku University, Sendai, Miyagi, Japan
Tatsuya Kubo
Tohoku University, Sendai, Miyagi, Japan
Shinji Ebara
Tohoku University, Sendai, Miyagi, Japan
Hidetoshi Hashizume
Tohoku University, Sendai, Miyagi, Japan
Paper No:
ICONE21-16105, V005T14A011; 7 pages
Published Online:
February 7, 2014
Citation
Kodate, S, Kubo, T, Ebara, S, & Hashizume, H. "Feasibility Study on Application of a Self-Formed Flow Field Downstream of Elbows to Divertor Cooling." Proceedings of the 2013 21st International Conference on Nuclear Engineering. Volume 5: Fuel Cycle, Radioactive Waste Management and Decommissioning; Reactor Physics and Transport Theory; Nuclear Education, Public Acceptance and Related Issues; Instrumentation and Controls; Fusion Engineering. Chengdu, China. July 29–August 2, 2013. V005T14A011. ASME. https://doi.org/10.1115/ICONE21-16105
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