Abstract

The structure of juncture flows caused by a flat plate mounted a short cylinder on has been experimentally studied through visualization and measurement. The experiment was conducted in a water tunnel with low turbulence intensity which is less than 0.3%. The test Reynolds number was changed from 1,000 to 32,000. The results suggested that (a) four typical flow patterns were visualized clearly, which correspond to four Reynolds number ranges respectively; (b) there are strong correlations between the oscillation of the juncture horseshoe vortex system and the velocity fluctuation of upstream separated shear layer.

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