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Numerical Simulation of Aerodynamic Processes of Air Mass Movement in Underground Tunnels Taking into Account Piston Impact of Rolling Stock

Purpose: To consider the issue on verification of numerical model of air exchange during the movement of a train in a subway tunnel, taking into account the process of interaction of regular ventilation with the piston effect of the displaced air by the body of the moving train. Methods: Data scanning and processing. The equipment used was a pressure cylindrical Pitot tube PFM 2 for measuring differential pressure and air flow velocity, volumetric flow and temperature. Results: The dynamic structure of disturbed fluid media at the time of rolling stock arrival and departure has been established. Practical importance: Factors of design solutions of tunnel portal part affecting the process of air exchange at the combined work of ventilation and piston effect of moving trains have been determined.