A Virtual Mass Model In Train Aerodynamics
Author(s)
I. Tanackov, J. Tepić, M. Kostelac, G. Stojić & Z. Masal
Abstract
The paper presents a new approach to the research into the aerodynamic
characteristics of vehicles and their interpretation. The approach is based on the
theory of collision. The virtual mass is related to the unit coefficient of
restitution of a central collision and to the absorption of kinetic energy. The basic
system is chosen to be a train, and the system involving the virtual mass effect is
air. A series of successive collisions of these two systems provides a model of air
resistance. The expression derived for the unit virtual mass states that it is equal
to a half of the coefficient of the square polynomial term of the air drag function.
Thus, a physical interpretation of the virtual mass has been obtained and the
metric system of the air resistance has been determined. A relation between the
virtual mass and the most important aerodynamic characteristic, i.e. the
coefficient of aerodynamic profile, has been established.
Keywords: aerodynamics, train resistance, ETR 500.
Keywords
aerodynamics, train resistance, ETR 500
Related Book
Other papers in this volume
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