斜め後方ステップ流れに関する実験的研究 : 第1報,流れ場全域の平均速度場(流体工学,流体機械)

概要

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In the present study, the flow over a swept backward-facing step, at a Reynolds number (based on the step height and the free stream velocity) of 8000 for the swept angle of 30 degrees, was investigated experimentally. Measurements were made for the mean flow field such as the surface flow direction, forward flow fraction, and mean velocity components. The flow field was examined in the regions of separation, reattachment, and following recovery to the two-dimensional flow. Lateral flows induced by the swept step significantly contribute to the variation of mean velocity profiles in the separated region. Reattachment distance of the flow over the swept step becomes about 10% shorter than that of the two-dimensional one. The mean velocity profiles collapse reasonably well on the Johnston's triangular model in the recovery region, and the profiles near the wall also collapse on the three-dimensional logarithmic law proposed by Johnston.
社団法人日本機械学会の論文
2004-08-25