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Na冷却高速炉における大口径配管の流力振動評価に関する研究,17; ホットレグ1/3縮尺試験における圧力変動への入口旋回流の影響

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 17; Effect of inlet swirl flow on pressure fluctuation in 1/3-scale hot-leg experiment

白石 直*; 佐郷 ひろみ*; 渡壁 寿人*; Xu, Y.*; 相澤 康介 ; 山野 秀将   

Shiraishi, Tadashi*; Sago, Hiromi*; Watakabe, Hisato*; Xu, Y.*; Aizawa, Kosuke; Yamano, Hidemasa

高レイノルズ数領域における旋回流を伴うエルボ流れの特性を実験的に取得した。旋回速度割合0$$sim$$15%を比較した所、エルボの剥離域が旋回流によって方向を曲げられたが、圧力変動の大きさに顕著な変化はなかった。

Flow characteristics in an elbow with swirl flow were experimentally obtained under a high Reynolds number regime. In the range of 0$$sim$$15% of swirl flow fraction, no significant effect of the swirl flow on the magnitude of pressure fluctuation was not seen although the flow separation region at the elbow was twisted by the swirl flow.

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