Aerodynamic characteristics of Ahmed body with inverted airfoil Eppler 423 and Gurney flap on fastback car

Arifin, Zainal and Suyitno and Dwi Prija Tjahjana, Dominicus Danardono and Juwana, Wibawa Endra and Rachmanto, Rendy Adhi and Brillianto, Chico Hermanu and Ubaidillah and Prasetyo, Singgih Dwi and Muhammad, Arinal Falah and Mohd Rosli, Mohd Afzanizam (2022) Aerodynamic characteristics of Ahmed body with inverted airfoil Eppler 423 and Gurney flap on fastback car. Automotive Experiences, 5 (3). pp. 335-370. ISSN 2615-6202

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Abstract

The installation of aerodynamic devices, such as rear wings with the application of a Gurney flap, is very important to improve the performance of vehicles and can generate downforce and reduce slip when a car turns and brakes. The goal of this study was to determine the aerodynamic characteristics of the addition of a rear wing using an Eppler 423 airfoil, which was applied with a Gurney flap featuring variations in the angle of attack and the height of the Gurney flap. The rear wing was mounted on the Ahmed body with a rear slant angle of 15⁰, which is similar to the configuration on a fastback type car. This research was conducted by 3D modeling through computational fluid dynamics (CFD) simulation using ANSYS Student R18.2 by using ahmed body design. There are three variations in the angle of attack for the rear wing (0⁰, 7.5⁰, and 15⁰), as well as five variations in Gurney flap height of 0%, 0.5%, 1%, 1.5%, and 2% for the chord-line length. In this study, the best variation was found at an angle of attack of 15⁰ with a height of 2% C. From this configuration improved CL/CD ratio by 25.36% when compared to the results without a Gurney flap.

Item Type:	Article
Uncontrolled Keywords:	Aerodynamic, Gurney flap, Computational fluid dynamics
Divisions:	Faculty of Mechanical Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	05 Feb 2025 11:13
Last Modified:	05 Feb 2025 11:13
URI:	http://eprints.utem.edu.my/id/eprint/28358
Statistic Details:	View Download Statistic

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