周期的に拡大,縮小を繰返す管内乱流の組織的構造

概要

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Organized structure in a periodically diverging-converging turbulent channel flow is investigated experimentally. Mean frequency and duration time of bursting are obtained using the VITA method. The contributions to uv in the four quadrants of the uv-plane are examined by means of the quadrant analysis technique. The bursting frequency and the contribution of the ejection to Reynolds shear stress decrease in the converging section and increase in the diverging section. These results are consistent with the finding that the Reynolds shear stress decreases due to acceleration and increases due to deceleration.
一般社団法人日本機械学会の論文
1993-08-25