Abstract
The three dimensional structure of the wake vortex was investigated in relating to the aeolian tone from the swept flat plate, which is installed in the uniform flow from zero to thirty degree of the swept angles with upper and lower wall. It was pointed out that the aeolian tone is largest not at zero, but at ten degree of the swept angle. It is proposed to estimate the correlation length that is corresponding to the sound source. The length is decided from the inclination of the vortex and the secondary wake vortex. They are relating to the span-wise velocity and the ratio of the vorticity components in the dead air region.
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