Abstract The purpose of this study is to examine the effect of the steady airflow field of a rear spoiler on the coefficients of drag ($ C_{D} $) and downforce ($ C_{DF} $). The type of spoiler is suggested as a two-jointed arm model that mimics the flapping flight mechanism of the Canada goose. Computational fluid dynamics (CFD) technique was used for the steady airflow analysis of a vehicle implemented with various spoiler topologies. We evaluated $ C_{D} $ and $ C_{DF} $ due to the three types of airfoils and the five phases of each airfoil. We obtained the following conclusions from the results: (1) We found that the best cases for $ C_{D} $ and $ C_{DF} $ were the case of Phase 5 and symmetry airfoil, and the case of Phase 1 and reverse airfoil, respectively. (2) It is clear that $ C_{D} $ becomes the largest at Phase 1 of the reverse airfoil, since the eddy magnitude at the rear of the vehicle is the largest, and $ C_{DF} $ also becomes the largest during that phase, since the pressure distribution on the upper surface of the spoiler is very large. (3) As Phase 1 moves to Phase 5 in the same type of airfoil, it is advantageous for $ C_{D} $ and disadvantageous for $ C_{DF} $, respectively.


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    Title :

    Effect of steady airflow field on drag and downforce


    Contributors:
    Kim, S. C. (author) / Han, S. Y. (author)


    Publication date :

    2016




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Classification :

    BKL:    55.20$jStraßenfahrzeugtechnik / 55.20 Straßenfahrzeugtechnik



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