FWF - AKURAD - Fluid-Structure-Acoustic Interaction of Enclosed Radial Fans

In this research project, the fluid-structure-acoustic interaction in a radial fan, operated in a spiral casing, is investigated. The sound field radiating to the outside via the structural vibrations of the casing can be excited in two different ways. The excitation can occur on the one hand through the transient flow field within the casing (path I, classical fluid mechanics - structural mechanics interaction), and on the other hand by acoustic pressure fluctuations in the interior of the casing generated by the flow (path II, flow acoustics and then acoustic structure mechanics interaction). Both types of structural excitation contribute to the sound field emitted by the casing vibrations into the environment of the machine. Sound, emitted by the air paths of the inlet and outlet cross-sections of considered fan, is not taken into account in this research project because it is bound to the specific installation conditions of the radial fan. The described configuration is a complex, multi-physical problem involving fluid mechanics, structural mechanics and acoustics.