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  • Open Access

    ARTICLE

    Numerical Analysis of the Aerodynamic Performance of an Ahmed Body Fitted with Spoilers of Different Opening Areas

    Haichao Zhou*, Wei Zhang, Tinghui Huang, Haoran Li

    FDMP-Fluid Dynamics & Materials Processing, Vol.21, No.5, pp. 1113-1131, 2025, DOI:10.32604/fdmp.2025.064991 - 30 May 2025

    Abstract The configuration of a spoiler plays a crucial role in the aerodynamics of a vehicle. In particular, investigating the impact of spoiler design on aerodynamic performance is essential for effectively reducing drag and optimizing efficiency. This study focuses on the 35° Ahmed body as the test model and examines six different spoiler types mounted on its slant surface. Using the Lattice Boltzmann Method (LBM) in XFlow and the Large Eddy Simulation (LES) technique, the aerodynamic effects of these spoilers were analyzed. The numerical approach was validated against published experimental data. Results indicate that aerodynamic drag More >

  • Open Access

    ARTICLE

    Parametric Optimization of Wheel Spoke Structure for Drag Reduction of an Ahmed Body

    Huihui Zhai1, Dongqi Jiao2, Haichao Zhou2,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 955-975, 2024, DOI:10.32604/cmes.2023.043322 - 30 December 2023

    Abstract The wheels have a considerable influence on the aerodynamic properties and can contribute up to 25% of the total drag on modern vehicles. In this study, the effect of the wheel spoke structure on the aerodynamic performance of the isolated wheel is investigated. Subsequently, the 35° Ahmed body with an optimized spoke structure is used to analyze the flow behavior and the mechanism of drag reduction. The Fluent software is employed for this investigation, with an inlet velocity of 40 m/s. The accuracy of the numerical study is validated by comparing it with experimental results obtained… More >

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