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Wet Modal Analysis of Wire-Wrapped Fuel Rod With the Axial Flow

[+] Author Affiliations
Haidong Liu, Deqi Chen, Lian Hu

Chongqing University, Chongqing, China

Paper No. ICONE25-67256, pp. V008T09A043; 14 pages
doi:10.1115/ICONE25-67256
From:
  • 2017 25th International Conference on Nuclear Engineering
  • Volume 8: Computational Fluid Dynamics (CFD) and Coupled Codes; Nuclear Education, Public Acceptance and Related Issues
  • Shanghai, China, July 2–6, 2017
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5786-1
  • Copyright © 2017 by ASME

abstract

Dynamic characteristics of wire-wrapped fuel rod was studied when the structure was coupled with fluid. In this paper, the wet modal analysis of wire-wrapped fuel rod in the axial flow was investigated by using the finite element method, which relied on fluid-structure interaction calculation. This numerical simulation is compared to experiments in the literature and the results agree well. The Lead-Bismuth Eutectic (LBE) was used as the working fluids. The CFD Simulations of a wire-wrapped fuel rod were performed with different boundary conditions. By comparing the modal characteristics of the fuel rod in the LBE and in vacuum, the results showed that the added mass of the fluid has important effect on vibration frequency of the wire-wrapped fuel rod. The different three frequencies and modal shape can be obtained under the different inlet velocity. According to the simulation result, it could be found that the maximal equivalent elastic strain occurred in the constrained end.

Copyright © 2017 by ASME

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