Figure 7
The x-axis represents distance in kilometers, and the y-axis represents time in seconds. The color gradient indicates pressure variations from -3 to 3 kPa. Solid and dashed lines mark the train nose and tail trajectories, respectively. The diagram shows pressure changes as the train moves through the tunnel, with higher pressures near the nose and lower pressures near the tail. All values are approximated.x–t diagram of the pressure field for the baseline case; solid and dashed lines mark the train nose and tail trajectories. Source: Author's own work