This paper summarizes first results of experiments with a detailed truck model performed at the beginning of this year. Objective of these tests was to show the model behavior in experimental conditions and to gain first impressions about the flow field characteristics of a detailed tractor-trailer configuration. The experiments were performed in the open test section wind tunnel of DLR Göttingen and in the cryogenic wind tunnel of DNW Cologne. They included flow visualizations with particle image velocimetry and force measurements. The experiments gave a first impression about the flow behavior of the truck model. These results allow the further development of the truck model and the test set-ups. Furthermore the test sections which will be used for future investigations of drag reducing devices were presented. This describes the available options for the realization of this research program. In this context it has to be noted that the 1M-Tunnel is not really suitable for investigations with a 1/15th scale truck model due to the high blockage of more than 5% and the short test section length. But the facility will be used for preliminary testing of drag reducing devices and their efficiency. Detailed investigations will be performed in the water towing tank. For further testing the intermediate floor will be improved to avoid motion due to the pressure field of the truck model and the test section will be increased to reduce blockage. For this the distance between tunnel ground and intermediate floor can be increased. Furthermore it is planned to enable rolling wheels during the test runs. In addition to the investigations of the main flow field of a truck the underbody flow shall also be investigated in future. The potential of the underbody region for drag reduction should be very high. For these investigations a second floor is available without gap. The model can be fixed at the roof to avoid the disturbance of the underbody flow.


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    Title :

    Experimental investigation on a detailed European tractor-trailer configuration


    Additional title:

    Experimentelle Untersuchung einer detaillierten europäischen Lastzugkonfiguration


    Contributors:


    Publication date :

    2009


    Size :

    12 Seiten, 24 Bilder, 6 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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