208 間欠式低温風洞を用いた後向きステップ流れの挙動評価

概要

論文の詳細を見る
The experimental study by using cryogenic wind tunnel has been conducted to estimate the location reattaching at the downstream of the backward-facing step and to clarify the unsteady phenomenon of the re-circulating flow. In the experiments, the fluid flow were visualized by use of a color schlieren method. The observation shows that the reattachment location over the backward-facing step ranges from X/H= 5 to 7 in the case of Mach number 0.08,where X/H indicates the ratio of the distance from the step face X to the step height H. On the other hand, in the case of Mach number 0.3,the observed results of reattachment point is X/H= 6 to 8. The fluctuation around the reattachment location may be taken to result that the unsteady "flapping" motion is reflected.
社団法人日本機械学会の論文
2002-10-05