Large-eddy simulations and full-scale investigationsEl-Alti, M. were carried out that aimed to reduce the aerodynamic drag and thus the fuel consumption of truck-trailers. The computational model is a relevantChernoray, V. generic truck-trailer combination, and the full-scale is a corresponding Volvo prototype vehicle. PassiveKjellgren, P. and active flow control (AFC) approaches were adopted in this work and applied at the rear end of the trailer. FlapsDavidson, L. were mounted at an angle that induces separation, and synthetic jet actuators were placed close to the cornerHjelm, L. of the rear end and the flaps. The drag reduction obtained is in the order of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$30\,\%$$\end{document}. The flow was analyzed by comparing the phase-averaged and time-averaged flow field of the unforced and the forced cases. The full-scale prototype is a Volvo truck-trailer. The trailer is mounted by three flaps at the rear sides and top end. The actuators consist of loudspeakers in sealed cavities, connected to amplifiers that are supplied with a frequency generator controlled by LabVIEW. The full-scale test includes passive and active flow control investigations by varying the flap angle, with and without AFC, investigating different frequency and slot angle configurations. The fuel flux was measured during the full-scale test. The test shows a fuel reduction of about \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$4\,\%$$\end{document} in a comparison of two flap angles. The test of active flow control shows a reduction of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$5.3\,\%$$\end{document} compared to the corresponding unforced case. Compared with the baseline case, the passive flow control fails to reduce the total fuel consumption.


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    Title :

    Computations and Full-Scale Tests of Active Flow Control Applied on a VOLVO Truck-Trailer


    Additional title:

    Lect.Notes in Applied (formerly:Lect.Notes Appl.Mechan.)


    Contributors:

    Conference:

    International Conference on Engineering Conferences International ; 2010 ; Potsdam, Germany September 12, 2010 - September 17, 2010



    Publication date :

    2015-08-20


    Size :

    15 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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