This paper investigates the surface pressures found on the sides of a Davis model under steady state conditions and during yawed oscillations at a reduced frequency which would generally be assumed to give a quasi-static response. The surface pressures are used to investigate the flow field and integrated to infer aerodynamic loads. The results show hysteresis in the oscillating model's results, most strongly in the A-pillar flows. The changes to the oscillating model's flow field reduces the intensity of the surface pressures around the rear pillars, reduce the strength and extent of the A-pillar vortex and cause the surface pressures to couple with the oscillating motion. This work shows the flows around the front of a vehicle may be more important to a vehicle's unsteady aerodynamics than is generally accepted and also leads to the conclusions that the reduced frequency parameter may not fully describe the onset unsteadiness.


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    Titel :

    Unsteady Aerodynamics of an Oscillating Fastback Model


    Weitere Titelangaben:

    Sae International Journal of Passenger Cars. Mechanical Systems
    Sae Int. J. Passeng. Cars - Mech. Syst


    Beteiligte:

    Kongress:

    SAE 2013 World Congress & Exhibition ; 2013



    Erscheinungsdatum :

    08.04.2013


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Unsteady Aerodynamics of an Oscillating Fastback Model

    Fuller, J.B. / Passmore, M. / Society of Automotive Engineers | British Library Conference Proceedings | 2013


    Cost-effective numerical analysis of the DrivAer fastback model aerodynamics

    Felekos, Georgios / Douvi, Eleni / Margaris, Dionissios | SAGE Publications | 2023


    Fastback DrivAer Car Aerodynamics with 3D Experience: A CFD Approach

    Mishra, Sujit / Pati, Aditya Kumar / Kumar, Dharmendra et al. | IEEE | 2024


    Renault 21 als Fastback

    Renault,FR | Kraftfahrwesen | 1989


    Unsteady inviscid-viscous analysis of oscillating aerodynamics

    Wolff, James / Fleeter, Sanford | AIAA | 1994