速度・圧力変動の相互相関関数を用いた後方ステップ流の研究

概要

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Large-scale turbulent structures in backward step flow are investigated from measurements of the cross-correlation between velocity fluctuation in the 3-dimensional flow field and pressure fluctuation on a reattachment plane. Large eddy structures and traces affecting a wall pressure are shown by sequential contours of cross-correlation as a function of time. The pressure fluctuation in a recirculation zone is mainly caused by the velocity fluctuations of a main flow, while in the reattachment region a pressure fluctuation is brought about by the velocity fluctuation entrained with a jet. This highly correlated region after the reattachment moves downstream with the same speed as the wall pressure fluctuation patterns visualized by real-time holographic interferometry.
一般社団法人日本機械学会の論文
1990-03-25