The interaction between cooling-air and external aerodynamics is known as interference. In a conventional car this interference under the hood results in additional drag. It is estimated that about 10% of the overall aerodynamic drag originates from the cooling air [1] depending on the car shape and cooling configuration. Obviously, cooling drag should be minimized for vehicles with low-drag aerodynamics. In this study cooling-air interference-effects are investigated through experimental, numerical and analytical methods with a focus on the surface pressure of the vehicle. The surface pressure of vehicles with and without interference effects is compared. Observations show that when the cooling-air inlet is opened a pressure rise occurs around the inlet, while a pressure drop appears around the outlet. This phenomenon was investigated for several vehicle shapes including a simplified bluff-body (SAE-Body) and a close-to-real quarter-scale model (aeromodel). Using this knowledge, a cooling duct with low cooling drag was investigated. It will be shown that the cooling drag decreases when the air is redirected appropriately, yet the pressure increase at the front of the vehicles cannot be avoided.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Aerodynamic Investigation of Vehicle Cooling-Drag


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Baeder, Dirk (Autor:in) / Adams, Nikolaus (Autor:in) / Unterlechner, Peter (Autor:in) / Indinger, Thomas (Autor:in)

    Kongress:

    SAE 2012 World Congress & Exhibition ; 2012



    Erscheinungsdatum :

    2012-04-16




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Aerodynamic Investigation of Vehicle Cooling-Drag

    Baeder, D. / Indinger, T. / Adams, N. et al. | British Library Conference Proceedings | 2012


    Aerodynamic investigation of vehicle cooling-drag

    Baeder,D. / Indinger,T. / Adams,N. et al. | Kraftfahrwesen | 2012


    2012-01-0170 Aerodynamic Investigation of Vehicle Cooling-Drag

    Baeder, D. / Indinger, T. / Adams, N. et al. | British Library Conference Proceedings | 2012


    Estimation of Vehicle Aerodynamic Drag

    B. Pershing / M. Masaki | NTIS | 1976


    Aerodynamic drag and engine cooling - conflicting goals?

    Emmelmann,H.J. / Berneburg,H. / Opel,Ruesselsheim,DE | Kraftfahrwesen | 1990