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Report No.

Influence of elbow curvature on flow structure at elbow outlet under high Reynolds number condition

Ono, Ayako; Kimura, Nobuyuki; Kamide, Hideki; Tobita, Akira

In the design of Japan Sodium-cooled Fast Reactor (JSFR), the flow-induced vibration (FIV) has been studied for the large-diameter hot-leg pipe with a short-elbow. The FIV will have a excitation source which is caused by the pressure fluctuation in the pipe. In this study, water experiments with two types of elbows with different curvature ratios were conducted in order to investigate the interaction between flow separation and the secondary flow due to the elbow curvature. The experiments were conducted with the short-elbow and the long-elbow under Re = 1.8E5 and 5.4E5 conditions.



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Category:Nuclear Science & Technology



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