Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2019 - September 11, 2019
A flat plate for ballast stabilization in place of chemical agents distributed on track ballast is newly developed for laborsaving in a process of removing and laying ballast. To investigate the flow field around and the aerodynamic characteristics of the plate placed on the top surface of the ballast, with the models of the track and the plate (hereinafter called "test plate"), the wind tunnel test is conducted to measure the wind velocity distribution using PIV and the forces of the plate using 3-component force sensor. The result shows that the wind velocity above the top surface of the track model is higher than that at upstream from the track model, and the drag coefficient of the test plate increases when the gap between the test plate and the ballast exists. Also, the tendency of the drag coefficient change with the attack angle of the plate differs from that of the simple flat plate. In addition, the results of the wind distribution show that the wind velocity is higher in the area above the test plate without holes than that with holes. In that case, the lift force of the test plate without holes is considerably higher than that with holes.
