速度・圧力変動の相互相関測定による乱れ構造の解明

概要

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The turbulent structures in the reattachment region of backward-facing step flow were investigated by using the crosscorrelations between velocity fluctuations of three-dimensional field and wall-pressure fluctuations. The sequential contour maps of crosscorrelation values were calculated from the simultaneous measurements in order to display the change and travelling of turbulent structures three-dimensionally. Two kinds of flow field were measured for comparision with the characteristics of the turbulent structures. It is found that the turbulent structures affected by the wall-pressure fluctuation at the measuring point move to the wall-pressure measuring point, and after the collision, the turbulent structures move downstream, staying near the wall. From the visualization results of the real-time two-dimensional wall-pressure fluctuation, these structures were brought about at various points simulataneously, which produced the three-dimensionality in the reattachment region.
一般社団法人日本機械学会の論文
1991-11-25