Aerodynamic analysis of car rear spoiler with computational fluid dynamics for different angles and profiles

Year 2023, Volume: 8 Issue: 4, 649 - 665, 22.12.2023

Muhammed Ali Öztemel , Fatih Aktaş , Nuri Yücel

https://doi.org/10.58559/ijes.1362690

Abstract

The aim of the study is to compare the drag coefficient, downforce coefficient, and downforce created by the spoiler by analyzing them with the help of the Computational Fluid Dynamics (CFD) program at different wing profiles, different angles of attacks, and speeds. Solidworks was used to create the geometry for CFD analysis. ANSYS Fluent was used as the CFD analysis program. Two airfoil profiles BE153-055 and BE153-175, were selected for analysis to compare different airfoil profiles. Selected airfoils were placed at 10° and 20° angles of attack to compare different angel of attacks and analyzed at 30 (m/s), 50 (m/s) and 70 (m/s) velocities to compare different velocities. According to the analysis results, it was observed that downforce increased in direct proportion to the camber line, angle of attack, and speed. The highest downforce was obtained in BE153-175 airfoil, 20 degrees angle of attack, and 70 (m/s) speed.

Keywords

Airfoil, Downforce, Computational fluid dynamics (CFD), External flow

References

• [1] Vishwakarma YK, Saxena MR, Nagrajan PK. Aerodynamic improvement of car body. International Journal of Engineering Research & Technology 2014; 3(6): 1761-1763.
• [2] Parab A, Sakarwala A, Paste B, Patil V, Mangrulkar A. Aerodynamic analysis of a car model using fluent Ansys 14.5. International Journal on Recent Technologies in Mechanical and Electrical Engineering 2014; 1(4): 07-13.
• [3] National Transportation Safety Board. 2012. Crash During Experimental Test Flight, Gulfstream Aerospace Corporation GVI (G650), N652GD, Roswell, New Mexico, April 2, 2011. Aircraft Accident Report NTSB/AAR-12/02. Washington, DC.
• [4] Bayındırlı C, Çelik M, Demiralp M. The investigation of flow characteristic around a bus model by CFD method and improvement of drag force by passive flow control method. Journal of Polytechnic 2018; 21(4): 785-795.
• [5] Kazi A, Acharya P, Patil A, Noraje A. Effect of spoiler design on hatchback car. International Journal of Modern Trends in Engineering and Research 2016; 3(9): 192-200.
• [6] Gorgulu YF, Ozgur MA, Kose R. CFD analysis of a NACA 0009 aerofoil at a low reynolds number. Journal of Polytechnic 2021; 24(3): 1237-1242.
• [7] Guerrero A, Castilla R, Eid G. A numerical aerodynamic analysis on the effect of rear underbody diffusers on road cars. Applied Science 2022; 12.
• [8] Widodo WA, Karohmah MN. CFD based investigations into optimization of diffuser angle on rear bus body. Applied Mechanics and Materials 2016; 836: 127-131.
• [9] Hu X, Zhang R, Ye J, Yan X, Zhao Z. Influence of different diffuser angle on sedan’s aerodynamic characteristics. Physics Procedia 2011; 22: 239–245.
• [10] Erişen A, Bakirci M. Modifications of NACA 0012, NACA 4412 airfoils and analysis them by CFD. Journal of Engineering and Technological Sciences 2014; 50–82.
• [11] Selvam MAJ, Kumar MR, Padmanabhan S, Subramanyam K, Reddy MN. Analyzing the downforce generated by rear spoiler of hatchback vehicle and creating an aeromapp using CFD analysis. Materials Today: Proceedings 2023; 92(1): 48-55.
• [12] Ipilakyaa TD, Tuleun LT, Kekung MO. Computational fluid dynamics modelling of an aerodynamics rear spoiler on cars. Nigerian Journal of Technology 2018; 37(4): 975-980.
• [13] Hammargren K. Aerodynamics modeling of sounding rockets. Ms. Thesis, Lulea University of Technology, 2018.
• [14] Aytaç Z, Aktaş F. Utilization of CFD for the aerodynamic analysis of a subsonic rocket. Journal of Polytechnic 2020; 23(3): 879-887.
• [15] ANSYS - Fluent User’s Guide v17.1, 2017.
• [16] Almohammadi KM, Ingham DB, Ma L, Pourkashan M. Computational fluid dynamics (CFD) mesh independency techniques for a straight blade vertical axis wind turbine. Energy 2013; 58.