The most striking feature in the wake interference of a row of normal flat plates arranged side by side is that the gap flow passing through the slit is biased either upward or downward in a stable way when the slit width is narrow. The origin of the biased flow and the mechanism of its stable biasing in one direction are investigated with water-tank experiments, numerical calculations and wind-tunnel experiments. The results show that the origin of biasing is strongly related to vortex shedding of each plate of a row, except for the case of very narrow slit width. Furthermore, it is suggested that the stability of a biased flow is particularly dependent on the behavior of the shear layer separated from the slit side of the plate on the unbiased side.
|Number of pages||16|
|Journal||Memoirs of the Faculty of Engineering, Kumamoto University|
|Publication status||Published - Dec 1 1985|
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