This paper combines heavy vehicle aerodynamics with environmental considerations. The problem of air pollution in urban environments is strongly connected to the emissions of local traffic. Moreover, by-pass road tunnels in densely populated areas use often longitudinal ventilation systems, which produce high concentrations at the outlet portal. An EU-LIFE project started to investigate the potential and the feasibility of combining dust filters with standard noise protection systems. As part of the project one application deals with the reduction of pollutant emissions from road tunnel portals. For the investigation of the effectiveness of these filters, simulations of a simplified heavy vehicle shape were conducted using Computational Fluid Dynamics (CFD). The first part of this paper deals with the validation of the CFD tool. Therefore, the Ground Transportation System (GTS) in the NASA Ames 7feet by 10feet wind tunnel was simulated and the results were compared to measurements. The second part covers the considerations of the flow field induced by heavy vehicle traffic within a highway road tunnel equipped with filters. As a result, the amount of the volume flow through the filters for one complete heavy vehicle cycle is displayed.
Computational simulation of the flow field of a filter system inside self-ventilated road tunnels due to heavy vehicle traffic
Rechnersimulation der Durchströmung eines Filtersystems in einem eigenbelüfteten Straßentunnel bei der Durchfahrt von Schwerfahrzeugen
2009
14 Seiten, 10 Bilder, 3 Tabellen, 13 Quellen
Aufsatz (Konferenz)
Englisch
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