Small Model Experiment on the Pressure Wave Formation by Entering the Tunnel of Conventional Limited Express with Diaphragmless Driver Acceleration Apparatus

Abstract

When a high-speed train enters a long tunnel, compression wave is generated in front of the train. This compression wave propagates in the tunnel at the speed of sound. In recent years, the running speed of train is increasing, and this problem of the tunnel pressure wave may occur by the conventional limited express. This paper deals with the pressure wave formation by the experiment using an apparatus with diaphragmless driver acceleration, and small train nose models of limited express in combination with a short tunnel and some station models. We have obtained pressure waveform data and discussed.