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ガス巻込み現象数値解析に関する研究

Study on CFD Approach for Gas Entrainment Phenomenon

江口 譲*

Eguchi, Yuzuru*

ナトリウム冷却高速炉の炉容器内自由液面(自由表面)からのカバーガス巻き込み現象評価に適切な数値解析モデルを調査するとともに、実機複雑流路形状への適用性および現象再現性が高いと考えられる有限要素法乱流解析モデルを構築した。また、円筒内ガス巻き込み実験のベンチマーク解析を実施し、その適用性を確認した。

Numerical modelling methods are reviewed to identify suitable schemes for the prediction or evaluation of gas entrainment phenomena in an upper plenum of a sodium-cooled fast breeder reactor (FBR). Based on these review results, a possibly suitable numerical scheme is formulated for practical and accurate evaluation of the gas entrainment in a sodium-cooled FBR. To evaluate the selected numerical schemes, a benchmark problem of a gas entrainment swirl flow in a cylindrical vessel was solved with the method.

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