Experimental Research On Fluid-structure Interaction Of Single Flexible Plate In The Rectangular Channel

It is very important for the reactor safety to research the flow-induced vibration (FIV) of the parallel-plate fuel assembly. This paper introduces a new method that the parallel-plate fuel assembly is simplified to a single-plate model in a rectangular channel, and the FIV of the single flexible plate in the rectangular channel is researched. In this paper, the flow information of single plate in the rectangular channel is first obtained by PIV. Then in the preparative experiment the natural frequency of the parallel-plate is measured in the air.The FIV of the parallel-plate is measured with the different velocity finally. The result indicates that the parallel-plate vibration in the water is just turbulent vibration phenomenon, the more the velocity is, the bigger the vibration displacement of the parallel-plate is, and the displacement changes little. With the increase of velocity, the parallel-plate vibrates acutely. The low frequency reduces, where the high frequency increases.