A Comparative CFD Study on Aerodynamic Performance of NxGV Chassis with and without a Rear Spoiler

Abstract

This study presents a comprehensive aerodynamic analysis of an NxGV chassis, assessed with and without a rear spoiler, utilizing computational fluid dynamics (CFD). Simulations were performed under uniform flow conditions using Autodesk CFD 2024 at 100 km/h to evaluate the impact of the spoiler on drag, pressure distribution, and turbulence characteristics. Findings indicate that the rear spoiler significantly modifies flow dynamics, increases downforce, and improves aerodynamic stability. The chassis with a spoiler generated a downforce of -8.63×10⁹ dynes, in contrast to -5.68×10⁸ dynes in the configuration without a spoiler, and elevated turbulent dissipation from 171,256.0 to 5,366,270.0 cm²/s³. Furthermore, drag experienced a slight rise from -2.44×10⁹ to - 2.84×10⁹ dynes. These numbers highlight the tangible advantages of including aerodynamic devices in vehicle design.