Research on the Influence of Cross Passage on High-speed Maglev Train Pressure Waves in Tunnels

This study aims to investigate the influence of cross passage on pressure waves in tunnels during the operation of high-speed maglev trains.Utilizing computational fluid dynamics numerical simulation techniques, a three-dimensional, unsteady, compressible Navier-Stokes equation coupled with the k-ω turbulence model was established to model the flow field inside the tunnel with cross passage.The results showed that increasing the diameter of the cross passage can significantly reduce the peak-to-peak pressure on the train body surface, while placing the cross passage in the middle of the tunnel minimizes the peak-to-peak pressure variation.Additionally, an increase in the length of the cross passage leads to an increase in the peak-to-peak pressure variation on the train body surface.Therefore, the design and arrangement of cross passage are crucial for mitigating the impact of pressure waves.The results of this study provide important references for ensuring the safe operation of high-speed maglev trains.