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ナトリウム冷却高速炉ホットレグ配管入口部における液中渦キャビテーションに関する研究,5; 複雑体系における吸込み管周囲の循環計測結果-

Study on cavitation due to sub-surface vortex at intake of hot-leg pipe in sodium cooled fast reactor, 5; Measurement of circulation around hot leg pipe intake in complicated geometry

江連 俊樹 ; 伊藤 啓; 亀山 祐理*; 上出 英樹 

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

液中渦キャビテーションついて、ナトリウム大型炉の炉上部プレナムと相似な形状を持った1/22縮尺の水試験装置においてホットレグ周囲の流速分布をPIV計測し、液中渦周囲の循環の大きさを把握した。その結果、ホットレグ入口流速で規格化した循環は粘性に依存せず、ほぼ一定であることを確認した。

Velocity measurements based on Particle Image Velocimetry were carried out in 1/22 scaled water model of sodium-cooled fast reactor to grasp velocity distributions around hot leg pipes. Circulation around sub-surface vortex was evaluated as an indicator of vortex strength using measured velocity distributions. As the results, it is confirmed the circulation normalized by the mean hot leg velocity was nearly constant and dose not depends on the variation of kinematic viscosity.

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