抄録
An experimental investigation was conducted on relations between a sound and vortices generated by a plane jet impinging on a circular cylinder ; the vortices consisted of those formed in the impinging jet and those shed from the cylinder. A thin splitter plate was attached to the rear side of the cylinder to modify the shed vortices. The nature of the shed vortices is shown to have a significant influence on the intensity and frequency of the sound. The intensity of the sound is closely related to the streamwise extent of distributed vorticity within the vortices ; the more compact the vortices, the stronger is the sound. The r.m.s. pressure fluctuation on the surface of the cylinder has no systematic relation to the intensity of the sound.
