Analysis of the action of the aerodynamic resistances on an electric multiple unit train type

Abstract

Abstract The present paper aims to analyse how aerodynamic resistances acting on an electric multiple unit train type are distributed during the movement. For this we considered a model, the case of the on an electric multiple unit train type that is in the operation of a railway company in Romania. Starting from the aspects mentioned in the literature, on how the aerodynamic resistances vary (it is directly proportional to the square of the displacement velocity), an initial estimation of the values of these forces is pursued. In the second step, it is performed an analysis of the airflow around the vehicle. To observe the evolution of aerodynamic resistances, the numerical simulation of airflow is used. In this sense, it has gone from the constructive shape of the train (which has been modelled in geometric form in 3D format) to its use in a specialized air flow simulation program. In this way the aerodynamic resistances acting on the train during the its movement are estimated.