平面壁上に置かれた透過壁立方体周りの流れ(第1報)
開口比とフローパターン
1985 年 33 巻 372 号 p. 25-34
詳細
1985 年 33 巻 372 号 p. 25-34
The flow around and behind a permeable wall cube set on a flat plate turbulent boundary layer has been investigated experimentally. Eight kinds of cubes, each different in the value of open area ratio, have been used in this experiment. Flow patterns are split into two cases considering the value of open area ratio β=0.32 to 0.40 as a boundary. One of them is the case for which the separation bubble causes behind a cube, and the other is the bubble is not observed. In the former, the separation bubble behind a cube moves downstream as the open area ratio increases. The tendency of spread of the wallwake region is characterized by the value of open area ratio in both x-y plane and x-z plane. These phenomena seem to be dependent on the strength of secondary flow found in the flow field behind a permeable wall cube.
