Characteristics of the Flow around Rectangular Cylinders : The Case of the Angle of Attack 0 Deg

Experimental investigations on the characteristics of the flow around rectangular cylinders were carried out in the range of subcritical Reynolds numbers. The width-to-height ratio (C/d) of the sections was varied from 0.1 to 4.0. The fluctuating pressure coefficient has a maximum in the same tendency as that of the drag coeffecient when C/d=0.67 and 2.8 become clear. The flow around the cylinder with an arc-like leading-edge corners has been found to agree closely with one around the cylinder with a larger value of the ratio of C/d.