Study of the coefficient drag characteristics of popular MPV vehicles in Indonesia

The aerodynamic characteristics of MPV vehicles were studied to obtain comprehensive information. The study was conducted computationally using the RANS equation on the k-ω SST turbulence model. The three vehicles selected in this study are Vauxhall Zafira C Tourer, Volkswagen Touran, and Mazda MPV II 2.3. These vehicles were chosen because they are quite in demand in Indonesia. Each vehicle was analyzed at three different speed variations, namely 20 km/h, 50 km/h, and 100 km/h. This research aims to study the characteristics of the drag coefficient (Cd) of several MPV vehicles. In addition, this study also analyzes the effect of changes in speed on the drag coefficient and its causes. The result of this research is that when viewed from the Cd point of view, the Volkswagen Touran has the smallest drag among the other two vehicles. From the Cd point of view, it can be seen that the Volkswagen Touran has the smallest drag, i.e., 0.75620101 at 20 km/h, 0.782 at 50 km/h, and 0.786 at 100 km/h. It was found that at a speed of 20 km/h, the Volkswagen Touran is still the best because the Cd is small and the power is small at 60,3126 hp. Then at a speed of 50km/h from the point of view of drag and power, the Volkswagen Touran vehicle is superior because the Cd produced is the smallest, and the average power is not much different from each other. At a speed of 100 km/h, the Volkswagen Touran is still superior because of its smallest drag and slightly less power when compared to other vehicles. Overall, when viewed from the Cd and power, the Volkswagen Touran is a superior MPV car because the Cd produced is small, and the power is also efficient.