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One of the important applications of CFD technique is modelling of the air distribution systems in ventilated and airconditioned areas. In this paper, numerical modelling was used to predict airflow in the air-conditioned driver's cabin of a modern rail vehicle. The aim of this study was to investigate indoor thermal and humidity conditions with the use of ANSYS CFX code. Therefore, the numerical model of the cabin was prepared in the presence of a driver. The boundary conditions were developed on the basis of the heat and moisture balance of the object. The air parameters like temperature, humidity and velocity were verified. Particular attention was paid to maintenance of optimal internal conditions due to the presence of a driver for 6 different cases of air distribution. The simulation results were compared with direct calculation results. For each of the studied cases, there were substantial differences in the distributions of air velocity and temperature. In any case, the maximum permissible air temperature and humidity were not exceeded globally. The recommended air velocities were exceeded locally.

CFD Modelling of The Airflow in The Driver's Cabin of a Modern Rail Vehicle