Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 16, 2023 - March 17, 2023
The velocity field around a cylinder was measured by PIV when the cylinder was moved in a Poiseuille flow in a circular pipe. The cylinder was placed coaxially with the circular pipe and moved at a constant speed in the axial direction. In the present experiment, the velocity distribution and flow rate in the gap between the circular pipe and the cylinder were investigated using the moving speed and diameter of the cylinder as parameters. It was found that the flow rate in the gap decreased with increasing cylinder movement speed, and the rate of decrease was significantly greater for larger cylinder diameters. Moreover, it was shown that the increase in the cylinder diameter also decreases the flow rate in the gap. From these results, it was suggested that the flow rate in the gap can be summarized using an approximate straight line with respect to the cylinder movement speed or the cylinder diameter. It was shown that as the movement speed and the diameter increased, the flow rate in the gap became more strongly affected by these parameters.
