Direct Aeroacoustic Simulation with Volume Penalization Method

Abstract

Flow and acoustic fields around a circular cylinder and a cascade of flat plates are clarified by direct simulations with a volume penalization method, which is a useful method to predict flow and acoustic fields around a complex geometry in a flow. The predicted results are compared with our experimental results or those of literatures. It is also clarified that the acoustic resonance occurs between the plates for a cascade of flat plates. The phase-averaged predicted flow fields present that the vortices shed from neighboring plates is synchronized in an anti-phase mode. As a result, the intense standing waves are generated between plates.