.png){kind=icon}
.png){kind=icon}
Return
Transient aerodynamic loads and spatiotemporal evolution of the temperature field in cold-region high-speed railway tunnels
.png){kind=icon}
PRE
AI
Y
Z
C
Y
L
H
Z
DOI：10.1016/j.coldregions.2026.104862.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
High-speed railway tunnels in cold regions are susceptible to severe frost damage, with their internal temperature field evolution significantly affected by the aerodynamic effects induced by train operation. In this study, a CFD dynamic mesh approach is employed to elucidate the coupled evolution mechanisms between transient aerodynamic loads and the tunnel temperature field in cold environments. The study clarifies that pressure waves generated by train operation exert a notable regulatory effect on the three-dimensional spatial distribution of train-induced airflow. A nonlinear relationship is observed between train speed and aerodynamic intensity. Additionally, the evolution of this airflow is delineated by a piecewise function, dividing it into a pressure-wavedominated phase and a residual-wind attenuation phase, while a dynamic modulation function is introduced to accurately capture the velocity oscillations induced by Mach waves. Based on static temperature field simulations, in conjunction with train frequency and external air temperature, a correction coefficient is proposed to adjust the anti-freeze insulation length for tunnels under the influence of train-induced airflow. The findings of this study provide theoretical support and technical guidance for frost resistance design of high-speed railway tunnels in cold regions.
Keywords:
Cold-region tunnel
High-speed train
Aerodynamic load
Temperature field
Numerical simulation
Journal
IF:
3.8
Papers:
3.6K
Citations:
1.2W
Organization
Cited Papers