An Experimental Study on the Structure of Juncture Flows

Article type: Research Article

Authors: Wei, Q.-D. | Chen, G.^; | Du, X.-D.^;

Affiliations: The State Key Laboratory for Turbulence Research, Peking University, Beijing 100871, China. | Department of Computer Science, Johns Hopkins University, Baltimore, MD 21218, USA. | Department of Civil Engineering, Concordia University, Quebec H4G 3C3, Canada.

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.

Keywords: juncture flow, horseshoe vortex, flow pattern, fluorescent dye

Journal: Journal of Visualization, vol. 3, no. 4, pp. 341-348, 2001