Drag Analysis of Commercial Passenger Car Using Aerodynamic Devices

Abstract

The environmental problems related with greenhouse gas emissions force researchers to explore better aerodynamically efficient designs. Aerodynamic efficiency provides for a reduction in drag on aerodynamic structures. This paper observes the drag analysis of commercial passenger car using aerodynamic devices. A numerical study has been carried out to investigate the reduction of drag force using aerodynamic devices such as spoiler, ducktail, and diffuser on Perodua Bezza model. Perodua Bezza model and 3 different aerodynamic devices designs were constructed using the modelling software, SolidWorks 2020 and simulated using 70, 110, and 150 km/h of wind speed using Ansys Fluid Flow (CFX). The use of aerodynamic devices, such as a ducktail and diffuser, on the Perodua Bezza model has been found to have a positive impact on the car's fuel consumption and stability. The analysis of the drag and lift coefficient reduction percentage showed that the combination of a ducktail and diffuser provides the least increase in drag coefficient while also contributing to a significant reduction in lift coefficient. This reduction in drag and increase in stability will help improve the fuel efficiency of the base model car. The installation of these aerodynamic devices, either individually or in combination, can enhance the dynamic stability of the Perodua Bezza or make it a more efficient vehicle, thanks to the reduction in aerodynamic drag.