Fong, Yee Pin (2020) CFD Modelling Of Automotive Aerodynamics Effect Of Afterbody Rounding. Project Report. UTeM, Melaka, Malaysia. (Submitted)
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CFD Modelling Of Automotive Aerodynamics Effect Of Afterbody Rounding.pdf - Submitted Version Download (300kB) |
Abstract
The performance of a vehicle is not only determined by the engine. Aerodynamic also plays a very important role in term of vehicle performance and safety. A car shape with good aerodynamic properties will have better high-speed stability, fuel consumption and safety. To improve the aerodynamic properties of a vehicle, afterbody rounding is one of the ways to do. Besides, car parts such as rear spoiler, air dams, canards can further improve the downforce of a vehicle. The rear spoiler will change the way of airflow behind the vehicle. It will help to increase the air pressure at the rear part of the vehicles by reducing the size of longitudinal vortices structure formed, which further improve grip. The purpose of this project is to find out the effect of afterbody rounding onto the Ahmed model. The roof edge rounding is according to the real hatchback vehicle. Besides, the effect of the rear spoiler is also considered. Different configurations of spoiler in term of angle is attached to the roof edge of Ahmed model. Both Ahmed model and rear spoiler are built-in Ansys Design Modeler software. Then, all different configurations of Ahmed model (original and rounded, with or without spoiler) are simulated in Ansys Fluent software to achieve the drag and lift force. This project is only based on the hatchback vehicle type. As the results, compare to the original Ahmed model, both drag and lift force after the roof edge is rounded. For cases with the rear spoiler, the changes in lift force are based on the rear spoiler angle. The changes in drag force are not significant. In conclusions, the best Ahmed model setup is Case 3 due to lower drag and lift force.
| Item Type: | Final Year Project (Project Report) |
|---|---|
| Uncontrolled Keywords: | Automobiles, Aerodynamics, Computational fluid dynamics |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics |
| Divisions: | Library > Final Year Project > FKM |
| Depositing User: | Sabariah Ismail |
| Date Deposited: | 28 Oct 2021 00:30 |
| Last Modified: | 28 Oct 2021 00:30 |
| URI: | http://digitalcollection.utem.edu.my/id/eprint/25460 |
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