This research aims to develop a tail-board add-on to reduce the aerodynamic drag experienced by heavy-duty trucks. When installed at the rear end of the container, the tail-board can delay the separation of airflow in the tail and improve the flow characteristics of tail eddy. In this0 study, the correctness of the heavy truck aerodynamics model is verified by the wind tunnel test of the 1:7.5 reduced model. The drag coefficient and pressure of the heavy-duty truck cruising at 25 m/s are analyzed by CFD simulation. After consideration of the baseline result of Computational fluid dynamics (CFD), the length and angle of tail-board are chosen as design variables for optimization. What’s more, a Kriging approximation model is constructed with 20 experimental points generated by the Optimal Latin Hypercube methodology. As a result, an aerodynamically optimized tail-board for the rear end of truck in which the aerodynamic performance improves by about 11.3% when compared to the baseline vehicle. Finally, 7 different pit-type non-smooth surfaces are arranged in tail-board of heavy-duty trucks to further enhance the drag reduction effect, and the drag coefficient is eliminated by another 2.51%. Therefore, the drag coefficient is reduced up to 13.8% than that of non-mounted trucks.
Aerodynamic Optimization of Tail-Board in Heavy-Duty Truck Based on Approximate Model and Non-smooth Surface
Lect. Notes Electrical Eng.
2022-01-13
18 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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