Français
2. The various aerodynamic drag phenomena: pressure, laminar boundary layer, turbulence...
To take a step closer to the physics of these phenomena, let's look at the evolution of air speed, as seen by a sensor placed at mid-vehicle height along the track, during the passage of a train in an ideal environment (no crosswinds, flat track and straight line) (figure 17 ). It starts with a peak at the nose of the train, then the air speed progresses gently along the train in the so-called boundary layer, with some disturbance at bogies and gaps between vehicles, followed by a larger, wider peak at the tail of the train.
The Ultimate Scientific and Technical Reference
This article is included in
Railway systems
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
The various aerodynamic drag phenomena: pressure, laminar boundary layer, turbulence...
Consequences and railway sectors concerned
Bibliography
Standards and norms
Commission Regulation (EU) No 1302/2014 of November 18, 2014 – TSI (Technical Specification for Interoperability) "Rolling Stock – Locomotives and passenger rolling stock"
Standard EN-14067-6) NF EN 14067-6 May 2010
Railway applications – Aerodynamics – Part 6: Requirements and test procedures for assessing stability against crosswinds
NF EN...
Directory
Since its creation in 1990, ARIA Technologies has been exclusively dedicated to the study of the atmospheric environment, and in particular to the numerical simulation of the dispersion of atmospheric pollutants.
AREP, the urban planning, architecture and engineering subsidiary of SNCF Gares et connexions, was created...
The Ultimate Scientific and Technical Reference
