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液中渦キャビテーション周囲の流速分布からの圧力低下量評価

Evaluation of pressure decrease at vortex center from velocity distribution around vortex cavitation

江連 俊樹 ; 伊藤 啓; 亀山 祐理*; 上出 英樹 ; 功刀 資彰*

Ezure, Toshiki; Ito, Kei; Kameyama, Yuri*; Kamide, Hideki; Kunugi, Tomoaki*

ナトリウム(Na)冷却高速炉における液中渦キャビテーションについての評価手法構築に関連し、基礎的な円筒体系での水試験を実施し、液中渦周囲の流速分布をPIV計測により定量把握した。得られた流速分布に対して前述の渦モデルを用いた評価手法を適用し、減圧量を評価した結果を報告する。

In this study, fundamental behavior of vortex cavitation was studied in cylindrical tank geometry related to establishment of an evaluation method of vortex cavitation in sodium-cooled fast reactors. Velocity distribution around vortex, which causes cavitation, was quantitatively grasped by means of Particle Image Velocimetry. Pressure drop at vortex center was also evaluated based on Burgers vortex model and compare to occurrence behavior of vortex cavitation.

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