抄録
A backward-facing step is used as a model problem for acoustic fatigue. The vortices generated in the wake of the step impose a time varying load on a flexible plate located downstream, parallel to the flow. 3D LES computations are carried out to simulate these coherent structures and their effect on the plate. In addition, the plate response to the simulated load is analysed using finite elements. The results are compared against measurements carried out at the University of Cincinnati [1]. The pressure fluctuation intensity on the measurement plate is found to be sensitive to the inlet boundary condition used, while the mean flow and the general spectral characteristics of the load on the plate are not sensitive to the inlet BC. Unfortunately, the plate response is over-predicted, also when the pressure fluctuation intensity compares well to the measurements.
