Abstract:
An experimental investigation of the static pressure distribution on the. square
cylinders with rounded facet is conducted. The study includes both the single cylinder
and the group consisting of two cylinders. The test is conducted in open circuit wind
tunnel at a Reynolds number 5.4 x 104 based on the face length across the flow with
uniforrh flow of velocity 13.6 m/s.
The study is conducted, initially on a single cylinder with various facet widths at zero
angle of attack. The five different dimensionless facet widths are considered in the
study with a view to observing the effect of the facet widths on the static pressure
distribution.
Then a group of cylinders is taken into consideration for the study. Each group
consists of two cylinders; one in front of the other is kept along the flow direction.
The static pressure distribution is monitored on each cylinder in the group varying the
inter spacing between the front and the rear cylinder.
The drag coefficient is determined from the static pressure distributions by the
numerical integration method. It is observed from the results that the drag coefficient
depends on the facet widths significantly. With the facet widths on the cylinder, the
drag reduces remarkably compared to that on the sharp edged cylinders. However,
with further increase of facet widths, drag does not change significantly.
