Aerodynamics

VÚKV a. s. deals with the wide spectre of questions in connection with the aerodynamic effects arising during an interaction of railway vehicles and infrastructure:

• Aerodynamic effects on open track (LOC & PAS TSI, INF TSI, EN 14067-4) – analytical or CFD assessment and optimization of vehicles, analysis of impacts on infrastructure;
• Maximum pressure variations in tunnels (LOC & PAS TSI, INF TSI, EN 14067-5) – numerical simulation and analysis of pressure signatures;
• Vehicle stability in cross wind – analysis and assessment according to EN 14067-6 or Ril 807.04 (analytic calculations, aerodynamic tunnel measurement, Multi-Body simulation), risk analysis of a vehicle operation on specific infrastructure section;
• Vehicle running resistance – total resistance calculations, assessment and optimization of the vehicle aerodynamic drag;
• Aerodynamic effects on ballasted track – critical areas analysis, proposals of countermeasures;
• Inlets and outlets – CFD assessment and optimization of aerodynamic effects (pressure and temperature field) around the areas of inlets and outlets;
• Vehicle and infrastructure loading due to aerodynamic effects – calculation of structure loads due to operation on open track, wind effects, operation in tunnels, vehicle passing, etc., definition of appropriate operational scenarios or proposals of operational countermeasures;
• Pressure tightness and pressure comfort – assessment and analysis of pressure tightness of the whole vehicle or separate components, analysis of pressure comfort for specific operation (on account of vehicle, infrastructure, operational scenario);
• Inner aerodynamics – analysis of the airflow in vehicle interior, in air ducting, etc.

VÚKV a.s. offers its capacity and experience in the aerodynamic area for the following activities:

• Consultancy during the study, design, testing and approval of vehicles or infrastructure;
• Supervising of aerodynamics during the project;
• Numerical simulation of the pressure variations in tunnels, structure loading, pressure comfort;
• CFD simulation (in cooperation with external subjects);
• Aerodynamic tunnel measurement (in cooperation with external subjects);
• Compilation of test specifications and other documents needed for homologation of vehicle or infrastructure.