The one-box type automobile's stability on the highway is often influenced by encountering crosswinds or when passing large automobiles such as trucks and buses. This causes the automobile to behave unexpectedly. Many experiments for improving this situation have been carried out. In this respect, the analysis of transient aerodynamic characteristics is important for automobile safety and stability on the highway. Conventional transient aerodynamic simulations require a supercomputer and about million grid points. Also there were few case studies that dealt with situations such as plunging into crosswind and passing an automobile.In this paper, a transient aerodynamic simulation by using a sliding mesh of discontinuous interface and the Arbitrary Lagrangian-Eulerian (ALE) method is presented. This method uses the k-ε turbulence model and the third-order upwind scheme, which is introduced to the convective term of the Navier-Stokes equation to improve the flow field and pressure distribution. It takes 100 hours to get the total transient results by using an engineering work station (EWS). Calculated yaw characteristics in a crosswind are in good agreement with experimental results.Furthermore, we have simulated the effect of an active spoiler in a crosswind, and the aerodynamic characteristic of passing a one-box automobile are carried out.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Transient Aerodynamic Simulation in Crosswind and Passing an Automobile


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1997



    Publication date :

    1997-02-24




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Transient Aerodynamic Simulation in Crosswind and Passing an Automobile

    Okumura, K. / Kuriyama, T. / Society of Automotive Engineers | British Library Conference Proceedings | 1997


    Transient aerodynamic simulation on crosswind and passing an automobile

    Okumura,K. / Kuriyama,T. / Daihatsu Motor,JP | Automotive engineering | 1997


    Transient Aerodynamic Simulation in Crosswind

    Okumura, K. / Kuriyama, T. | British Library Online Contents | 1997


    Aerodynamic derivatives on vehicle stability passing through crosswind

    Takada,H. / Kohri,I. / Mitsubishi Motors,JP | Automotive engineering | 1987