Abstract
Air velocity and pressure distributions on the sides of 16-car high-speed trains both in open and tunnel sections are measured to investigate the flow structure around the trains. It was found that the air velocity in the narrower space between the train side and the tunnel wall gradually decreases from the head toward the tail of the train while that in the other wider space increases, and that the features of the velocity and pressure fields observed on board in tunnel sections can be also detected from the ground.
