Solar Electric Vehicle Body Design Inspired by the Peregrine Falcon for Aerodynamic Drag Reduction
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Abstract
This research presents the design of a solar-powered electric vehicle body using a biomimetic approach inspired by the shape of the Peregrine Falcon, a bird known for its streamlined form and high-speed flight. Three vehicle models were developed and analyzed using Computational Fluid Dynamics (CFD) at wind speeds of 80 and 120 kilometers per hour. The study found that Model 3, which was refined to be more streamlined and practically applicable, achieved a reduction in the aerodynamic drag coefficient from 0.164 to 0.139. However, the lift coefficient increased from 0.0276 to 0.095. The improved model effectively reduced airflow separation and vortex formation at the rear of the vehicle, resulting in better aerodynamic flow performance. Furthermore, the use of CFD simulations significantly reduced both the time and cost required for prototype development. The findings demonstrate that this nature-inspired design approach has strong potential for the development of low-drag solar electric vehicles and can be effectively applied to future clean energy vehicle design.
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References
Intergovernmental Panel on Climate Change, Climate Change 2022: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change, H.-O. Pörtner, D. C. Roberts, M. Tignor, E. S. Poloczanska, K. Mintenbeck, A. Alegría, M. Craig, S. Langsdorf, S. Löschke, V. Möller, A. Okem, and B. Rama, Eds., IPCC, Geneva, Switzerland, 2022.
A. Chauhan, A. Singh, P. Baredar and V. Pant, "Solar powered electric vehicles and their charging infrastructure: A review," Energy Reports, vol. 7, pp. 1875-1891, 2021.
M. A. Green, E. D. Dunlop, J. Hohl-Ebinger, M. Yoshita, N. Kopidakis and X. Hao, "Solar cell efficiency tables (version 61)," Progress in Photovoltaics: Research and Applications, vol. 31, no. 1, pp. 3-12, 2023.
S. Chauhan, et al., "Integration of solar cells into electric vehicles: A review of technologies, design, and performance," Renewable and Sustainable Energy Reviews, vol. 144, p. 111021, 2021.
K. Li and L. Wu, "Computational Fluid Dynamics for Vehicle Aerodynamics," SAE Int. J. Passenger Cars - Mechanical Syst., vol. 10, no. 2, pp. 93-101, 2017.
H. Yeo and S. Hwang, "Design of a Solar-Powered Vehicle Using Biomimetic Principles for Drag Reduction," Energy Convers. Manage., vol. 185, pp. 88-98, 2019.
H. Lohse-Busch, M. Duoba, E. Rask and K. Stutenberg, “Ambient temperature (20°F, 72°F and 95°F) impact on fuel and energy consumption for several conventional vehicles, hybrid and plug-in hybrid electric vehicles and battery electric vehicle,” SAE Technical Report, SAE International, 2013.
S. Sebben and A. Vdovin, Aerodynamics of Passenger Vehicles, class lecture, Road Vehicle Aerodynamics VT16, Chalmers Technical University, Gothenburg, Sweden, 2016.
J. Han, M. Zhang and X. Gong, "Aerodynamic drag reduction of electric vehicles based on flow control: A review," Renew. Sustain. Energy Rev., vol. 156, p. 111974, 2022.
D. Yang, Q. Zhao and H. Zhang, "Biomimicry in engineering design: A comprehensive review," J. Bionic Eng., vol. 20, no. 1, pp. 1–27, 2023.
L. R. Tucker, “The deep dive: Peregrine falcon high-speed stoops and aerodynamic efficiency,” Nature, vol. 509, no. 7500, pp. 473–476, 2014.
J. Katz and A. Plotkin, Low-Speed Aerodynamics, 2nd ed. Cambridge, UK: Cambridge University Press, 2001.
R. Palin, V. Johnston, S. Johnson, et al., "The aerodynamic development of the Tesla Model S – Part 1: Overview," SAE Technical Paper 2012-01-0177, SAE International, 2012.
S. Suman, A. Kumar and P. R. Sharma, "Computational fluid dynamics simulations for vehicle aerodynamics: Recent advances and applications," Appl. Energy, vol. 296, p. 117059, 2021.
G. K. Batchelor, An Introduction to Fluid Dynamics. Cambridge, U.K.: Cambridge Univ. Press, 2000, pp. 264–377.
H. Wang, A Guide to Fluid Mechanics. Cambridge, U.K.: Cambridge Univ. Press, 2023, pp. 57–107
I. Khalil and I. Lakkis, Computational Fluid Dynamics: An Introduction to Modeling and Applications. New York, NY, USA: McGraw Hill, 2023.
M. A. Leschziner, "Reynolds-Averaged Navier–Stokes methods," in Encyclopedia of Aerospace Engineering, vol. 3, J. D. Anderson and M. J. L. Turner, Eds. Chichester, U.K.: Wiley, 2010, pp. 1–10.
B. E. Launder and B. Rodi, The Turbulence Model: A Second-Moment Closure. Berlin, Germany: Springer-Verlag, 1981.
B. E. Launder and D. B. Spalding, "The numerical computation of turbulent flows," Comput. Methods Appl. Mech. Eng., vol. 3, no. 2, pp. 269–289, 1974.
J. D. Anderson, Fundamentals of Aerodynamics, 5th ed. New York, NY, USA: McGraw-Hill, 2015, pp. 45–60.
BurningCandleSample. (2020, May 1). PsBattle: Peregrine falcon diving in the air, side view [Online]. Available: https://www.reddit.com/r/photoshopbattles/comments/g9jn6r/psbattle_peregrine_falcon_diving_in_the_air_side/
X-engineer.org. How to calculate aerodynamic drag force [Online]. Available: https://x-engineer.org/aerodynamic-drag/
BWSC. (2025). Vehicle Specifications and Regulations, Bridgestone World Solar Challenge [Online]. Available: https://www.worldsolarchallenge.org/rules/vehicle-specifications/
SimScale. (2023). Aerodynamic Flow Behavior Around a Vehicle Tutorial [Online]. Available: https://www.simscale.com/docs/tutorials/aerodynamic-simulation-vehicle/
F. M. White, Fluid Mechanics, 8th ed. New York, NY: McGraw-Hill Education, 2016.
J. D. Anderson, Jr., Fundamentals of Aerodynamics, 6th ed. New York, NY: McGraw-Hill Education, 2017.
S. Kumar et al., "Effect of air speed on aerodynamic drag and lift forces on a sport utility vehicle," SAE Int. J. Passeng. Cars – Mech. Syst., vol. 9, no. 1, pp. 181–188, 2016.
R. L. DeLaurier, "Aerodynamics of birds," Comp. Biochem. Physiol. A: Mol. Integr. Physiol., vol. 133, no. 1, pp. 3–14, 2002.
H. Hucho, Aerodynamics of Road Vehicles: From Fluid Mechanics to Design. Oxford, U.K.: Butterworth-Heinemann, 1998.
B. E. Larcombe, "The aerodynamics of blunt bodies," Prog. Aerosp. Sci., vol. 12, no. 2, pp. 97–164, 1972.
D. R. Kuethe and C.-Y. Chow, Foundations of Aerodynamics: Bases of Aerodynamic Design, 5th ed. Hoboken, NJ: John Wiley & Sons, 1997.
S. F. Hoerner and H. V. Borst, Fluid-Dynamic Drag: Theoretical, Experimental and Statistical Information. Midland Park, NJ: Hoerner Fluid Dynamics, 1985.