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Aerodynamic Study of Sedan Car for Increasing Fuel Efficiency by Vortex Generators

G. Sivaraj*, J. P. Ramesh **, G. Lokesh ***

* Department of Aeronautical Engineering, Bannari Amman Institute of Technology, Erode, Tamil Nadu, India.

**-*** Department of Mechanical Engineering, SRM Valliammai Engineering College, Chennai, Tamil Nadu, India.

Periodicity:August - October'2021
DOI : https://doi.org/10.26634/jme.11.4.18095

Abstract

The aerodynamic performance of passenger cars is focused on this research work for reduction of aerodynamic drag force. Better aerodynamic car design will reduce the aerodynamic drag force which will save more fuel, good stability and handling on vehicle. Aerodynamic drag force on the car occurs due to the car profile design and its surface while moving with high speeds. When the car accelerates above 70 kmph, energy available on the flow is less due to the flow separation at rear side of the vehicle. Hence, flow is hesitated to move past the sharp corner on the rear side. This flow separation will produce significant wake on rear side of the car and increase the aerodynamic drag force. This paper proposes a method to reduce the wake region at rear side of the vehicle and to enhance the aerodynamic performance of vehicle by add-on device like vortex generator (VG) attachment on the vehicle. The computational studies have been carried out to study the effect of VG attachment on the vehicle for reduction of aerodynamic drag force. The computational studies are done with real road flow conditions for sedan car model with and without attachment of VG. Result of each car model has been compared with contour of pressure distribution, velocity flow field and turbulent kinetic energy. From computational simulation studies, it has been observed that aerodynamic drag coefficients of car model without VG attachment is 0.3371 and after implementing the VG with optimized parameter in the car has been reduced to 0.3161 at velocity 20 m/s. It has been observed that percentage of reduction of coefficient of drag is 6.22%.

Keywords

Fuel Efficiency, Drag Force, Car Model, Vortex Generator, Computational Result.

How to Cite this Article?

Sivaraj, G., Ramesh, J. P., and Lokesh, G. (2021). Aerodynamic Study of Sedan Car for Increasing Fuel Efficiency by Vortex Generators. i-manager's Journal on Mechanical Engineering, 11(4), 11-18. https://doi.org/10.26634/jme.11.4.18095

References

[1]. Brzustowicz, J. P., Lounsberry, T. H., & de La Rode, J. M. E. (2002). Experimental & computational simulations utilized during the aerodynamic development of the dodge intrepid R/T race car. SAE Transactions, 2387-2403.

[2]. Gaylard, A. P. (2009). The appropriate use of CFD in the automotive design process (No. 2009-01-1162). SAE Technical Paper. https://doi.org/10.4271/2009-01-1162

[3]. Hucho, W. H. (1998). Aerodynamics of road vehicles (4 Ed.). Warrendale, USA: SAE International.

[4]. Kang, S. O., Jun, S. O., Park, H. I., Song, K. S., Kee, J. D., Kim, K. H., & Lee, D. H. (2012). Actively translating a rear diffuser device for the aerodynamic drag reduction of a passenger car. International Journal of Automotive Technology, 13(4), 583-592. https://doi.org/10.1007/s1223 9-012-0056-x

[5]. Marklund, J., Lofdahl, L., Danielsson, H., & Olsson, G. (2013). Performance of an automotive under-body diffuser applied to a sedan and a wagon vehicle. SAE International Journal of Passenger Cars-Mechanical Systems, 6(1), 293- 307. https://doi.org/10.4271/2013-01-0952

[6]. Milliken, W. F., & Milliken, D. L. (1995). Race car vehicle dynamics. Warrendale, USA: SAE International. Retrieved from https://www.worldcat.org/title/race-car-vehicledynamics/ oclc/1057960134?referer=di&ht=edition

[7]. Mosaddeghi, F., & Oveisi, M. (2015). Aerodynamic drag reduction of heavy vehicles using append devices by CFD analysis. Journal of Central South University, 22(12), 4645-4652. https://doi.org/10.1007/s11771-015-3015-7

[8]. Schenkel, F. K. (1977). The origins of drag and lift reductions on automobiles with front and rear spoilers. SAE Transactions, 1661-1671.

[9]. Soares, R. F., & de Souza, F. J. (2015). Proposal of an aerodynamic concept for drag reduction of fastback car models (No. 2015-36-0523). SAE Technical Paper. https:// doi.org/10.4271/2015-36-0523

[10]. Wu, P. S., Young, M. J., Wu, J. Y., Wang, C. C., Hu, H. Y., & Chang, C. F. (2016). Improvement on aerodynamic characteristics and drag reduction for supermileage cars with wide view field, In defect and diffusion forum (Vol. 366, pp. 47-62). Trans Tech Publications Ltd. https://doi.org/10. 4028/www.scientific.net/DDF.366.47

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