The impact of aerodynamics on fuel consumption in railway applications
Journal Title: INCAS BULLETIN - Year 2012, Vol 4, Issue 1
Abstract
The main consequence of on air flow surrounding a moving train resides in the aerodynamic drag and a certain pressure distribution on the frontal and lateral surfaces of the vehicle. The actual value of the aerodynamic drag (if pre-determined) may lead to a more accurate design of the whole locomotive power transmission. The aerodynamic drag may be estimated by using two specific experiments: the traction method and the free launch method. While the first one uses highly complex equipment, the second is easier to use due to the relative low number of devices required. The present work’s main goal is to illustrate the importance of aerodynamic design of the railway vehicles, as their performances are influenced by the aerodynamic drag. In order to illustrate the influence of the aerodynamic shape of o locomotive body, we have chosen the latest diesel model available on the local market, the Class 621 EGM locomotives, currently in service at the national passenger railway operator, CFR Călători SA.
Authors and Affiliations
Ioan SEBESAN, Bogdan TARUS
[b]EXPLOSIVE FORMING – ECONOMICAL TECHNOLOGY FOR AEROSPACE STRUCTURES[/b]
The explosive forming represents a technological alternative for obtaining small-lot parts, with inexpensive and efficient manufacturing preparation. The explosive forming processing methods present a series of important...
GNSS Navigation Threats Management on-Board of Aircraft
This paper proposes low-complexity measures to be deployed on most aircraft to enable the management of Global Navigation Satellite Systems (GNSS) interference, and in particularly of jamming and spoofing threats, in ord...
Optimization of flapping-wing micro aircrafts based on the kinematic parameters using genetic algorithm method
In this paper the optimization of kinematics, which has great influence in performance of flapping foil propulsion, is investigated. The purpose of optimization is to design a flapping-wing micro aircraft with appropriat...
Static and Dynamic Design Methods for Hybrid Bolted Joints in a Satellite Structure
A detailed analytical design for hybrid (metal-composite) bolted joints in static and dynamic (random vibrations) analysis is presented in this paper. Due to the fact that a space structure must be lighter and stiffened,...
Influence of drag force upon the shortest time trajectory of an aircraft
The shortest time trajectory of an aircraft between two given locations is determined using a simple mathematical model. By taking into account the drag force (viscous friction force with the air), a problem of variation...