@Article{fdmp.2025.064991,
AUTHOR = {Haichao Zhou, Wei Zhang, Tinghui Huang, Haoran Li},
TITLE = {Numerical Analysis of the Aerodynamic Performance of an Ahmed Body Fitted with Spoilers of Different Opening Areas},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {5},
PAGES = {1113--1131},
URL = {http://www.techscience.com/fdmp/v21n5/61480},
ISSN = {1555-2578},
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 is strongly influenced by the spoiler’s opening area, with certain configurations achieving a drag reduction as high as 6.5%. This configuration effectively suppresses airflow separation in the wake of the Ahmed body, reducing the formation of separation bubbles on the slant surface and enhancing pressure recovery on both the slant and base regions. The observed pressure recovery is attributed to the reduction in vortex loop breadth and length.},
DOI = {10.32604/fdmp.2025.064991}
}