Acoustics and turbulence related to the flow over a flexible plate structure behind an obstacle

Abstract

Experimental and numerical investigations of the fluid-structure interaction and the radiated sound induced by the turbulent flow over a thin flexible plate structure are presented. Various inflow conditions are generated by placing obstacles of different size, shape, position and material in front of a flexible plate. The flow-induced vibration of the plate structure is measured using a laser-scanning vibrometer. Based on the measurement of the vibration of the flexible plate, the sound radiation to the far field is computed employing a finite-element acoustics solver. The flow is investigated in detail using three-component hot-wire anemometry. Microphone measurements are carried out to generate a basis of comparison. The experiments are performed in an acoustic wind tunnel. © 2010 Springer-Verlag Berlin Heidelberg.