Contribution of Secondary Vortex at Trailing Edge to Motion-induced Vortex Vibration of Rectangular Cross Sections with Side Ratios of B/D=0.62-2.0

Abstract

In this study, smoke flow visualizations were performed for ratios of B/D=0.5?2.0 in order to find out the relation between side ratios of rectangular cross sections and secondary vortices at trailing edge in motion-induced vortex excitation. The smoke flow visualizations around the model during oscillating condition were conducted in a small-sized wind tunnel at Kyushu Institute of Technology. Experimental Reynolds number was Re=VD/v=1.6×10³. For the forced-oscillating amplitude η, the non-dimensional double amplitudes were set as 2η/D=0.02-0.15.