| Abstract [eng] |
Truck manufacturers seeking to meet customer needs and keep up with the changing laws of heavy vehicles exploitation, constantly needs to look for ways to improve the characteristics of the truck, as well as aerodynamics characteristics of the vehicle. The aim of this project is to investigate how the aerodynamic properties of a truck are influenced by individual aerodynamic devices and their general use on the vehicle. In order to meet the set goals, using SolidWorks program, selected Mercedes-Benz Actros 2646 and Swarchmuller's semi-trailer model. Using the Flow Simulation package of this program and modeling the airflow of a truck without any additional aerodynamic devices, determined that there are three main areas of a truck that are aerodynamicly problematic: the space between the tractor and the semi-trailer, the height of the tractor and the semi-trailer, and the end of the semi - trailer. The results show that the aerodynamic drag performance of individual aerodynamic devices can reduce trucks aerodynamic forces up to 5%, using all three devices combined possible 10% reduction in aerodynamic forces, while using additional aerodynamic devices, an 18% of lower aerodynamic resistance is obtained. Lateral flow tests showed even greater aerodynamic importance of fairings when operating a truck in the cross-flow. As a result, the truck with additional airdeflectors will be exposed to a lateral airflow of 22% less than truck without fairings. |
