D222 スパン方向へ生成される平板翼の空力音源に関する研究

概要

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The lateral variations of the wake vortices are considered by the equation for the longitudinal component of the mean vorticity. The equation could be transformed to Poisson equation in regard to Reynolds stress <vw>^^^-with assumption by results of the numerical simulation. According to the simulation, the vertical vortices are generated at the edge of the 2-dimensional share of the wake. The Reynolds stress <vw>^^^-, where are traversed y-z section in the center position of the wake vortices, form swirl distribution at the region from the wall to developed 2-dimensional share layer of the wake. It is considered that the aeroacoustic sources to the span direction such as the lateral variations are caused by the vertical vortex at the edge of 2-dimensional share layer.
2001-07-31