Open AccessAir distribution in long transportation tunnels of the Baikal–Amur Mainline (BAM)
Author(s) -
A. M. Krasyuk,
И. В. Лугин,
Е В Алферова
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/523/1/012011
Subject(s) - fluent , aerodynamics , railway tunnel , piston (optics) , airflow , flow (mathematics) , engineering , ventilation (architecture) , drag , marine engineering , environmental science , computer simulation , meteorology , structural engineering , simulation , aerospace engineering , mechanics , mechanical engineering , physics , optics , wavefront
This paper presents the research findings on air distribution due to piston effect in long railway tunnels. Modeling was performed for a freight train 1 km long in tunnels 3 and 6 km in length by way of numerical experimentation in the ANSYS Fluent environment. As a result, the relations of the air pressure on the front and back surfaces of the train to the train location in the tunnel were obtained, and the aerodynamic drag in the tunnel clearance was evaluated. The results were used to develop a quasi-dynamic model of piston effect for solving problems on static air distribution with network models. The air flow rates calculated for various cross-section tunnels with ANSYS Fluent and a network model exhibited satisfactory agreement. In the meanwhile, the time of solution for a tunnel 3 km long is 4·10 5 shorter with the network model than with 3D model, which is of practical importance in case of multi-variate calculations in ventilation deign for railway tunnels.