Feasibility study of application of a self-formed flow field downstream of elbows to divertor cooling

Shoichi Kodate, Tatsuya Kubo, Shinji Ebara, Hidetoshi Hashizume

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationFuel Cycle, Radioactive Waste Management and Decommissioning; Reactor Physics and Transport Theory; Nuclear Education, Public Acceptance and Related Issues; Instrumentation and Controls; Fusion Eng.
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791855829
Publication statusPublished - 2013
Event2013 21st International Conference on Nuclear Engineering, ICONE 2013 - Chengdu, China
Duration: 2013 Jul 292013 Aug 2

Publication series

NameInternational Conference on Nuclear Engineering, Proceedings, ICONE


Other2013 21st International Conference on Nuclear Engineering, ICONE 2013

ASJC Scopus subject areas

  • Nuclear Energy and Engineering


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