Numerical Investigation on the Piston Effect in Subway Tunnels

Król, Aleksander; Król, Małgorzata

doi:10.1007/978-3-031-22359-4_7

Cited by 1 publication

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The research on the piston effect of moving trains and vehicles in tunnels [4][5][6][7][8][9][10][11][12] was mostly studied in tunnels up to 1000 m long with vehicles and trains not exceeding 150-200 m in length. Throughout this article, we discuss freight trains that are 1200-1500 m long.…”

Section: Introductionmentioning

confidence: 99%

Substantiation of Parameters of the Network Model of the Air Distribution Due the Piston Effect in the Extra-Long Tunnels

et al. 2023

View full text Add to dashboard Cite

The article analyzes the aerodynamic processes initiated by the piston effect in extra-long railway tunnels. The authors numerically modelled the movement of a freight train, 1 km long, in tunnels 3 and 6 km long. The analysis used the ANSYS Fluent environment. The modeling determined the air pressure at the front and back faces of the train, the draught loss in the tunnel clearance, as well as the air velocity in the tunnel clearance and in the tunnel. These data are used to develop a quasi-dynamic model of the piston effect for solving problems concerning air distribution with the application of network models. The air flow rates calculated in ANSYS Fluent and using the network models agree quite well. The time of the problem solving for a tunnel 3 km long using the network model is shorter by 5 orders of magnitude, which is of significant importance for both the study and multivariate design of ventilations systems for railway tunnels.

show abstract