Mathematical modeling of air distribution dynamics due to piston effect of trains in long railway tunnels

Abstract

Abstract The stationary and nonstationary problems on air flow under piston effect of trains in long railway tunnels are solved using the methods of computational aerodynamics. The comparison of the results reveals erroneous calculation of air exchange in case of the stationary problem formulation. The validity of calculating tunnel ventilation by integration of the static air distribution network models and the quasi-dynamic models of piston effect is justified.