Abstract
In Japan Atomic Energy Agency (JAEA), a study on flow induced vibration in the primary cooling system of Japan Sodium cooled Fast Reactor (JSFR) consisting of large diameter pipe and pipe elbow with short curvature radius has been conducted. Flow-induced vibration in the elbow is an important issue in design study of JSFR, because it may affect to structural integrity of the pipe. In this paper, numerical simulations for flow at Re=5x1O^5 through pipe elbows in curvature ratios of 1 and 2 were conducted to validate an in-house LES code named as MUGTHES for the pipe elbow flow and to investigate flow characteristics through the elbows. Numerical results showed good agreement with the experimental results in time average field. Flow characteristics were clarified in relation to the curvature ratio of the elbow.
