دوره 16، شماره 1 - ( 12-1404 )
جلد 16 شماره 1 صفحات 4979-4966 |
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Ahmadabadi Asle Alamdari A, Chehrmonavari H, Kakaee A. A Numerical Investigation of Inter-Vehicle Spacing on Aerodynamic Drag Using a Two-Dimensional Ahmed Body Model. ASE 2026; 16 (1) :4966-4979
URL: http://ase.iust.ac.ir/article-1-734-fa.html
URL: http://ase.iust.ac.ir/article-1-734-fa.html
A Numerical Investigation of Inter-Vehicle Spacing on Aerodynamic Drag Using a Two-Dimensional Ahmed Body Model. Automotive Science and Engineering. 1404; 16 (1) :4966-4979
چکیده: (1040 مشاهده)
| This study employs two-dimensional CFD simulations to analyze how rear slant angle and inter-vehicle spacing dictate aerodynamic drag in a tandem Ahmed body configuration. We systematically evaluated slant angles from 15° to 45° and longitudinal spacings from X/L = 0.1 to 0.5. The results delineate three distinct aerodynamic regimes for the trailing vehicle: a drafting zone at close distances (X/L=0.1) with significantly reduced drag, an interference zone (X/L=0.2-0.3) where drag peaks, and an independence zone (X/L>0.4) where vehicles behave aerodynamically isolated. Furthermore, the model successfully captures the critical drag rise as the slant angle surpasses 30°, a key flow transition. While the simulation over-predicts absolute drag values, which is an expected outcome of the 2D approach, it demonstrates high fidelity in capturing complex trends, providing foundational insights for optimizing vehicle platooning strategies. |
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