Numerical Prediction of Flow Induced Vibrations in Nuclear Reactors through Pressure Fluctuation Modelling

Flow induced vibrations (FIV) is a known problem in nuclear reactors. The interaction between the turbulent flow of the coolants and the fuel rod bundles generates vibrations which are undesirable. These vibrations can be a major cause of fatigue failures, stress corrosion cracking and fretting wear of materials, which lead to stand-still costs....

Development of a Coupled Fluid-Structure Simulation Method in the Frequency Domain

In this work a numerical method is developed to efficiently simulate limit cycle oscillations and forced response amplitudes of fluid-structure interaction (FSI) problems. The method computes a solution in the frequency-domain and can therefore only deal with periodic unsteadiness. As flow solver the Harmonic Balance method is used which is...