Naslov
A virtual mass model in train aerodynamics

Autori
<tanackov, Ilija ; Tepić, Jovan ; Kostelac, Milan ; Stojić, Gordan, Masal, Zoran

Izvornik
WIT Transactions on The Built Environment / Comuters in Railway (1743-3509) 127 (2012); 733-744

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pregledni rad, ostalo

Ključne riječi
aerodynamics, train resistance, ETR 500.

Sažetak
He 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.

Izvorni jezik
Engleski

Znanstvena područja
Matematika, Strojarstvo

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