Rekayasa Fairing Terhadap Coefficient Drag Mobil Hemat Energi Mengunakan Simulasi Aerodinamis

This study aims to analyze the effect of fairing engineering on the aerodynamic characteristics of an energy-efficient vehicle using Computational Fluid Dynamics (CFD) simulation, determine the drag coefficient (Cd) of each fairing design variation, and identify the most effective fairing design for improving the vehicle's aerodynamic performance. The research employed a quantitative approach through CFD simulation using ANSYS Fluent. Three vehicle models were analyzed, namely the original design, fairing modification variation 1, and fairing modification variation 2. The analyzed parameters included pressure distribution, airflow pattern, turbulence visualization, drag coefficient (Cd), and aerodynamic drag force. The results indicate that fairing engineering has a positive effect on the vehicle's aerodynamic characteristics. The modified fairing produced a more uniform pressure distribution, delayed the occurrence of flow separation, and reduced the wake region behind the vehicle, resulting in a more stable airflow. The drag coefficient decreased from 0.6119 for the original design to 0.5772 for fairing variation 1 and 0.5680 for fairing variation 2. In addition, the aerodynamic drag force decreased from 69.70 N to 63.74 N and 32.96 N, respectively. Based on the simulation results, fairing variation 2 demonstrated the best aerodynamic performance by producing the lowest drag coefficient and drag force among all tested designs. Therefore, it can be concluded that fairing engineering effectively improves the aerodynamic efficiency of energy-efficient vehicles.