Numerical study and design of side-diffusers for formula-SAE car

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C. Chatpattanasiri
K. Bunpapong
M. Sahastharachai
B. Puangkird

Abstract

This research focuses on designing side-diffusers for Formula Student race car. The aim is to reduce the lap time in a circular track called Skid-pad event by mean of increasing downforce generated by the diffusers, a ground effect aerodynamic device. Utilizing three-dimensional CFD simulation via cloud computing to obtain the most optimal design among the studied parameters. The study employs SST k-omega turbulence model with an incompressible flow and isothermal assumptions and the CFD model is validated via wind tunnel testing. Finally, the results show that the optimal outlet angle of 32 degrees due to the behavior vortex above the diffuser and the higher the outlet to inlet height, the lesser downforce.

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Chatpattanasiri, C. ., Bunpapong, K. ., Sahastharachai, M. ., & Puangkird, B. (2022). Numerical study and design of side-diffusers for formula-SAE car. Journal of Research and Applications in Mechanical Engineering, 10(1), JRAME–22. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/246797
Section
RESEARCH ARTICLES

References

Katz, J. Race car aerodynamics: Designing for speed, 1995, Bentley, Cambridge.

Wordley, S. and Saunders, J. Aerodynamics for formula SAE: Initial design and performance prediction, SAE Technical Paper, 2006, pp. 1-12.

Wordley, S. and Saunders, J. Aerodynamics for formula SAE: A numerical, wind tunnel and on-track study, SAE Technical Paper, 2006, pp. 1-15.

Hetawal, S., Gophane, M., Ajay, B. and Mukkamala Y. Aerodynamic study of formula SAE car, Procedia Engineering, Vol. 97, 2014, pp. 1198-1207.

Li, C., Li, J., Wu ,N. and Zhang, S. Optimization design of FSAE racer body based on CFD, Journal of Machine Design, Vol. 31(8), 2014, pp. 70-73.

Falconer, R. and Nye, D. Chaparral: Complete history of Jim Hall's Chaparral race cars 1961-1970, 1992, Motorbooks International, Richmond.

Reid, E.G. A full-scale investigation of ground effect, 1927, Washington, Government printing office.

Ranzenbach, R. and Barlow, J.B. Two-dimensional airfoil in ground effect, an experimental and computational study, SAE Technical Paper, 1994, pp. 1-9.

Jasinski, W.J. and Selig, M.S. Experimental study of open-wheel race-car front wings, SAE Technical Paper, 1998, pp. 2549-2557.

Zerihan, J. and Zhang, X. Aerodynamics of a single element wing in ground effect, Journal of Aircraft, Vol. 37(6), 2000, pp. 1058-1064.

Zhang, X. and Zerihan, J. Aerodynamics of a double-element wing in ground effect, AIAA Journal, Vol. 41(6), 2003, pp. 1007-1016.

Cooper, K.R., Bertenyi, T., Dutil, G., Syms, J. and Sovran, G. The aerodynamic performance of automotive underbody diffusers, SAE Technical Paper, 1998, pp. 150-179.

Ruhrmann, A. and Zhang, X. Influence of diffuser angle on a bluff body in ground effect, Journal of fluids engineering, Vol. 125(2), 2003, pp. 332-338.

Jowsey, L. and Passmore, M. Experimental study of multiple-channel automotive underbody diffusers, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 224(7), 2010, pp. 865-879.

Tritton, D.J. Experiments on the flow past a circular cylinder at low Reynolds numbers, Journal of Fluid Mechanics, Vol. 6(4), 1959, pp. 547-567.

Shao, S., Zhang, Y., Zhao, J. and Tang, W. The influence of wheel rotating to FSAE racing car aerodynamic characteristics, Applied Mechanics and Materials, Vol. 300-301, 2013, pp. 1054-1057.