Flow-induced vibration

Page 1 : Flow-induced vibration in FBR

Page 2 : Experimental set-up
Page 3 : Visualization of flow structure and evaluation of pressure distribution

Flow-induced vibration in FBR

The primary piping system of sodium-cooled fast reactor JSFR (Japan sodium-cooled fast reactor) that is now being designed at a rapid pace is organized in two loops to simplify the coolant flow system and to reduce amount of material used. This system adopts a large-diameter piping with high coolant velocity, which has increased the Reynolds number up to the order of 10⁷. As a result, great attention must be paid to flow-induced vibration (FIV) caused by flow separation generated in a low curvature elbow used in thin-walled piping system.

Schematic view of JSFR (Japan Atomic Energy Agency http://www.jaea.go.jp/english/index.shtml�j