| Περίληψη: | Freight transports by means of heavy duty trucks constitute nearly 75% of the total transportation in the EU. Billions of euros are spend every year in fuel importations (Eurostat, 2016) in order to cover these needs and in addition with the reduction of global fuel reserves the cost of transportation is constantly rising. Studies have shown that aerodynamic drag, on tractor trailer combination, is the main contributor of fuel consumption on highway speeds (50% at 80km/h and up to 70% at 113km/h). This study will investigates the effect of add-on devices have on the fuel consumption of heavy duty trucks travelling on highway speeds. Target areas are the forefront of the trailer, the underbody area and the base trailer region where nearly 75% of the total drag is observed. Analysis of the airflow where performed on Solidworks Flow Simulation and analysis of the composite panels where performed Patran-Nastran.
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