混相流
Online ISSN : 1881-5790
Print ISSN : 0914-2843
ISSN-L : 0914-2843
【論文特集】混相流研究の進展
X線イメージングを用いた球充填層内のボイド率分布計測
山本 誠士郎大平 直也伊藤 大介伊藤 啓齊藤 泰司今泉 悠也松場 賢一神山 健司
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2023 年 37 巻 1 号 p. 79-85

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In the safety study on a sodium-cooled fast reactor, it is assumed that the high-temperature fuel debris are formed because of a core disruptive accident. During the cooling of the fuel debris, gas-liquid two-phase flow can be generated in the debris due to the coolant boiling. To improve the prediction accuracy of the flow characteristics, detailed measurement of the gas-liquid two-phase flow in the debris bed is required. In this study, gas-liquid two-phase flow in a quasi-two-dimensional sphere-packed bed, which simulates the debris bed, is visualized by using X-ray imaging. The experimental results show that the local void fraction increases near the splitting section in the packed bed and decreases near the coalescence section.

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