Study on vortex cavitation in scaled upper plenum model of Japan Sodium-cooled Fast Reactor, 2; Investigation of effective cavitation suppressor

JSFR炉上部プレナムモデルによる液中渦キャビテーションに関する研究,2;キャビテーション抑制構造の有効性に関する検討

萩原 裕之*; 江連 俊樹 ; 伊藤 啓; 上出 英樹 

Hagiwara, Hiroyuki*; Ezure, Toshiki; Ito, Kei; Kamide, Hideki

A water test visualizing vortex cavitation inception have been carried out using 1/11 scale upper plenum model of Japan Sodium-cooled Fast Reactor. The influence of the splitter on the vortex cavitation has been examined. In addition to that, a measurement test for flow velocity distribution around the vortex has been performed by means of the particle imaging velocimetry (PIV). In the visualization test, the vortex cavitation inception occurs much more easily in the case without the flow splitter than that with the flow splitter. Besides, it has been observed that the influence of kinematic viscosity coefficient on the vortex cavitation inception decreases by installing flow splitter. As a result of the measurement test, the correlation has been found between the magnitude of circulation and the vortex cavitation inception.