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Two-phase flow simulation of gas entrainment phenomena in large-scale experimental model of sodium-cooled fast reactor

ナトリウム冷却高速炉の実規模ガス巻込み試験を対象とした気液二相流解析

伊藤 啓; 功刀 資彰*; 大島 宏之; 河村 拓己*

Ito, Kei; Kunugi, Tomoaki*; Ohshima, Hiroyuki; Kawamura, Takumi*

高速炉ガス巻込み現象のために高精度気液二相流数値解析手法の開発を進めている。本件では、解析手法検証の一環として、実規模ガス巻込み現象を対象とした数値解析を実施した。その結果、ガスコア発生などの典型的な気液界面非定常挙動を解析することに成功し、高速炉ガス巻込み現象を数値解析によって評価できる見通しを得た。

The authors have been developed a high-precision and high-performance numerical simulation algorithm for gas-liquid two-phase flows to simulate the gas entrainment (GE) phenomena in fast reactors. In this paper, the developed simulation algorithm is applied to the GE phenomena in a large-scale water experiment. As a result of the unsteady simulation, a typical interfacial dynamic behavior, i.e. the development of a gas core (interfacial dent), is well simulated. Therefore, it is confirmed that the developed simulation algorithm is suitable to evaluate numerically the GE phenomena in the fast reactors.

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