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Title of the article RAILWAY FREIGHT CAR MODEL AERODYNAMICS AT DIFFERENT AIRFLOW ATTACK ANGLES
Authors

SHIMANOVSKY Alexander O., D. Sc. in Eng., Prof., Head of the Department “Technical Physics and Theoretical Mechanics”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

DZEMYANCHUK Volha U., Postgraduate Student of the Department “Technical Physics and Theoretical Mechanics”, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section MECHANICS OF MOBILE MACHINES
Year 2024
Issue 2(67)
Pages 23–29
Type of article RAR
Index UDK 533.6.011:004.94
DOI https://doi.org/10.46864/1995-0470-2024-2-67-23-29
Abstract The problem solution is considered for an airstream flow around a rectangular parallelepiped railway car model. The results of computer modeling in ANSYS CFX software system of air flow aerodynamics at its deviation from the longitudinal axis of the car are given. The k-ε turbulence model is used to close the Navier–Stokes equations averaged by Reynolds. The distribution diagrams of the flow velocities and pressures on the frontal and side surfaces of the vehicle are obtained. The values of aerodynamic drag coefficients of the car depending on the attack angle are determined. It is shown that when the attack angle increases from 0 to 10°, the aerodynamic coefficient changes nonlinearly, and this increase corresponds to the experimental values. The developed numerical modeling technique makes it possible to analyze the airflow around both railways rolling stock and automobiles.
Keywords aerodynamics, airstream flow, computer modeling, aerodynamic coefficient
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