Effect of Tapper Ratio on a Car Rear Spoiler Performance
DOI:
https://doi.org/10.22219/jemmme.v4i1.7982Keywords:
coefficient drag, coefficient lift, downforce, dragforce spoiler, tapper ratioAbstract
The increasing development of car modification and the lack of understanding on the function of using spoilers or rear wings on vehicles, underlies the research on the aerodynamic forces acting on cars. The influence of this aerodynamic device will produce a compressive force to the bottom of the vehicle or called downforce, where this force is greatly influenced by the CL (lift coefficient) value. The purpose of this study was to determine the effect of variations in the tapper ratio on the value of downforce and drag force on on single-element type spoilers made using a NACA 6412 airfoil. The research was conducted using the Computational Fluid Dynamic method using ANSYS Fluent software with steady state pressure based solver. In this study five variations of the tapper ratio were used, namely: 1:1; 1:0.5; 1:0.7; 0.5:1; and 0.7:1. The fluid properties used are adjusted to the climate and weather in general air conditions and at air flow speeds of 100 km/h. Based on the research conducted, it can be concluded that the highest lift coefficient value was achieved in the 1:1 tapper ratio variation which was equal to CL = -0.2275 and CD = 0.0195. The highest downforce value is achieved in the 1:1 tapper ratio variation that is equal to L = -107,529 N and the largest drag force value is also achieved in the 1: 1 tapper ratio variation that is equal to D = 9.2269 N. The best CL/CD results are obtained at the 1:05 tapper ratio variation with a value of 12.82.
Downloads
References
Katz J. Race Car Aerodynamics Designing for Speed Engineering and Performance. 1995. p. 279.
Tsai CH, Fu LM, Tai CH, Huang YL, Leong JC. Computational aero-acoustic analysis of a passenger car with a rear spoiler. Applied Mathematical Modelling. 2009;33(9):3661–73.
Hai-Tao B. Study the effect of rear spoiler on car aerodynamics characteristics. ICCSE 2011 - 6th International Conference on Computer Science and Education, Final Program and Proceedings. 2011;(Iccse):460–3.
Nadia O, Norwazan AR, Khalid AJ, Zulkiffli AK, Fuad MN. Experimental and Numerical Analysis of Lift and Drag Force of Sedan Car Spoiler. Applied Mechanics and Materials. 2012;165:43–7.
Pachpund S, Madhavan J, Pandit G, Chimner T. Development of CFD Methodology for Drag Force Prediction on Passenger Car with Rear Mounted Spoiler. SAE Technical Paper Series. 2012;1.
Sunanda A, Nayak MS. Analysis of NACA 2412 for Automobile Rear Spoiler Using Composite Material. International Journal of Emerging Technology and Advanced Engineering. 2013;3(1):236–42.
Beigmoradi S, Jahani K, Keshavarz A, Bayani Khaknejad M. Aerodynamic Noise Source Identification for a Coupe Passenger Car by Numerical Method Focusing on the Effect of the Rear Spoiler. SAE Technical Paper Series. 2013;1.
Febriyanto N, Sarjito, Aklis N. Studi Perbandingan Karakteristik Airfoil NACA 0012 dengan NACA 2410 Terhadap Koefisien Lift dan Koefisien Drag pada Berbagai Variasi Sudut Serang dengan CFD. 2014;(April).
Mashud M, Das RC. Effect of rear end spoiler angle of a sedan car. AIP Conference Proceedings. 2017;1851.
Kumar MVS, Rao BA, Mallaiah G. Design, Analysis and Manufacturing of a Car Rear Spoiler for Drag Reduction. International Advanced Research Journal on Sciences, Engineering and Technology. 2017:4(6):89-96
Cakir, Mustafa, CFD study on aerodynamic effects of a rear wing/spoiler on a passenger vehicle. 2012. Mechanical Eneingeering Master Theses. Paper 1.
Deressa KK, Sureddy KK. Design and analysis of a new rear spoiler for SU vehicle mahindra bolero using CFD. International Research Journal of Engineering and Technology. 2016:03(06):914-24
Chandra R, Riyad M. CFD Analysis of Passenger Vehicle at Various Angle of Rear End Spoiler. Procedia Engineering. 2017:194:160-5
Blocken B, Toparlar Y. Journal of Wind Engineering a Following Car Influences Cyclist Drag: CFD simulations and wind tunnel measurements. Journal of Wind Engineering and Industrial Aerodynamic. 2015:145:178-86
Thabet S, Thabit TH. CFD Simulation of theAir Flowarounda Car Model (Ahmed Body). International Journal of Scientific and Research Publications. 2018:8(7):517-25
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-NonCommercial 4.0 International License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.