Effects of distance between plates on flows around a cascade of flat plates with acoustic resonance

摘要

To clarify the effects of the distance between the plates on the flow and acoustic fields around a cascade of flat plates, direct simulations of flow and acoustic fields and wind tunnel experiments were performed. The ratio of the distance to the plate thickness was changed from 0.5 to 13.0. For s/b = 3.0, 6.0, the intense resonant acoustic radiation occurs along with the synchronization of the vortex shedding from neighboring plates. The reason why the acoustic radiation becomes weak for the smaller and larger distance are discussed using computational results.