Aero-, thermodynamics, fluid dynamics and environmental physics

Major parts of modern, high-speed rail links are often built as tunnels. Because of the elevated train velocities, various aerodynamic phenomena occurring during train passage need to be considered for tunnel design. Additionally in long tunnels and in metro systems the tunnel climate might be an important issue for the tunnel design.

Aero- and thermodynamics of tunnel systems

Lötschberg base tunnel

Ventilation and safety concept


Bijlmer Station, Amsterdam

Aerodynamic loads


Gotthard and Lötschberg base tunnel

Climate simulations

Gotthard base tunnel

Climate during maintenance


Tabriz underground tunnel

Safety and ventilation concept

Augsburg mobility hub

Safety and ventilation concept

Guadarrama tunnel, high-speed railway

Aerodynamics, climate and equipment


Brenner base tunnel

Ventilation system


High-speed train TGV-Duplex

Aerodynamic measurements on open track


Hauenstein base tunnel

Ventilation during refurbishment


High-speed rail tunnels in Sweden

Numerical studies regarding tunnel aerodynamics


California High Speed Rail – Palmdale to Burbank

Ventilation concept and environnemental conditions


Västlänken rail project in Göteborg

Design of the tunnel ventilation system


Cable tunnel Mushriff-Mamzar Beach-Nahda

Ventilation and cooling

Interactions with the environment are to be taken into account when designing and constructing underground infrastructure buildings. HBI Haerter realizes the relevant parameters and analyses the environmental effects on underground plants with regard to the construction and operation phase. Conversely, HBI analyses the effects of infrastructure buildings on the environment and plans appropriate measures. Relevant environmental-physical services by HBI concern analyses, planning of measures, measurements and simulations.

Environmental physics

Reference list of immissons