Train Simulation Software | Exa Corporation


Super Nav


Rail Industry Simulation Solution for Aerodynamics and Acoustics

The rail industry faces greater challenges than ever before. High-speed trains push the limit of engineering; customers demand high-quality, efficient, quiet, comfortable, and consumer-friendly trains; competition is global; and margins are slim. The old methods of product development are no longer sufficient. Building prototypes to test performance is not only cost-prohibitive but impossible to do at full scale. More importantly, the engineering team needs to understand how the train will perform in real-world operating conditions very early in the product development process — months or years before any prototype could be built. Fast, accurate, digital simulation is now essential to a competitive product development process.

The best simulation tools can address many of the difficult engineering problems encountered during train design. The automotive and aerospace industries have developed and validated fluid flow simulation software over many years, and this software is ready for use by the rail industry. Using fluid flow simulation software, you can accurately determine aerodynamic drag and side-gust forces, even with highly turbulent flow over the extremely complex geometry of the underbody, bogies, and pantographs. You can optimize electric motor and electronics cooling in cramped spaces. In addition, you can predict and address community noise (which is a significant, regulated issue) and passenger cabin comfort. Cabin comfort is one of the biggest customer demands and a potential product differentiator.

Exa has the solution. PowerFLOW’s unique, inherently transient Lattice Boltzmann-based physics enables it to perform simulations that accurately predict real-world transient conditions on the most complex geometry. Using the PowerFLOW suite, you can evaluate product performance early in the design process — when change has the smallest impact on both the design process and engineering budget. PowerFLOW imports fully complex model geometry, and accurately and efficiently performs transient aerodynamic, aeroacoustic, and thermal management simulations. PowerFLOW applications have been fully validated and are in deep productive use at many of the world’s premier automotive, heavy vehicle, and aerospace manufacturers.


Exa offers solutions for the following train industry applications:

HIGH-SPEED AERODYNAMICS — Aerodynamic efficiency; cross-wind and side-gust stability; underbody flow; soiling and water management; panel deflection; and rail bed pressure

ACOUSTICS — Underbody wind noise source identification and reduction (including nose, bogies, intercavity, appendages, and pantographs); cooling fan noise source identification and reduction; community noise propagation; and interior noise propagation

ENVIRONMENTAL CONTROL SYSTEMS — Cabin thermal comfort; duct and fan noise; and HVAC duct and fan performance

THERMAL MANAGEMENT — Engine compartment ventilation; electronics thermal protection; brake cooling; and soak