Plasma and Fusion Research

Volume 18, 2405034 (2023)

Regular Articles

Heat Transfer Characteristics Evaluation of Multi-Elbow Cooling System for Fusion Divertor under One-Sided Heating
Shinji EBARA, Kenya MITOBE, Yukinori HAMAJI1) and Hidetoshi HASHIZUME
Tohoku University, 6-6-01-2 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8579, Japan
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
(Received 9 January 2023 / Accepted 13 March 2023 / Published 5 June 2023)

Abstract

In this study, a cooling system for fusion reactor divertor that utilizes a swirling flow generated downstream of multi-elbow piping was proposed, and flow fields of the multi-elbow piping (triple elbow) were investigated using flow visualization experiment. Additionally, heat transfer experiment was conducted under one-sided heating condition to simulate a fusion reactor environment. The results revealed that the heat flux removed by the swirling flow in the elbow piping exceeded the critical heat flux in straight piping, and a heat removal performance of up to 25 MW/m2 was achieved.

Keywords

divertor cooling, boiling heat transfer, multi-elbow piping, swirling flow, one-sided heating

DOI: 10.1585/pfr.18.2405034

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