Plasma and Fusion Research and Nuclear Fusion Research
巻, 号, ページ
Vol. 8
pp. 1-6
出版年月
2013年3月19日
出版者
和文:
プラズマ核融合学会
英文:
The Japan Society of Plasma Science
会議名称
和文:
英文:
開催地
和文:
英文:
アブストラクト
Liquid metals Li, Pb-17Li and Sn-20Li are candidate liquid breeders in fusion reactors. The development of
a flowmeter that can be applied to high-temperature liquid metals is an important issue. A heat-pulse flowmeter
is proposed in the present study. Its basic performance was investigated by means of a loop experiment with Pb-17Li and a numerical simulation. The temperature distribution in flowing Pb-17Li was obtained by local transient
heating of the outer surface of a loop tube. The temperature distribution gradually changed and resembled the
movement of a hot spot, which had a higher temperature than its surroundings. This hot spot moved along
the flow and passed through the tips of the thermocouples. The change in temperature distribution with the
movement of the hot spot was monitored by three thermocouples exposed to the Pb-17Li flow. The results of
the loop experiments were numerically simulated by assuming a certain flow rate, and the temperature profile
obtained in the loop experiment was in agreement with the simulation results. The time taken by the hot spot to
pass through the tips of the thermocouples was measured and simulated, and the correlation between this time
and the average flow velocity was evaluated. The results indicated the average flow velocity can be obtained
using the heat-pulse flowmeter proposed in this study.
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