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Volume 121
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10.3390/engproc2025121029
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Proceeding Paper

On the Aerodynamic Characteristics of the Aurel Persu Car †

by
Adrian Clenci
1,*,
Amélie Danlos
2,
Ivan Dobrev
2 and
Victor Iorga-Simăn
1
1
Department Automobiles and Transport, Bucharest, Pitești University Centre, The National University of Science and Technology Politehnica Bucharest, 110040 Pitești, Romania
2
Arts et Métiers Institute of Technology LIFSE, Le Cnam, HESAM University, 75013 Paris, France
*
Author to whom correspondence should be addressed.
†
Presented at the 17th International Scientific Conference on Aerospace, Automotive, and Railway Engineering (BulTrans-2025), Sozopol, Bulgaria, 10–13 September 2025.
Eng. Proc. 2026, 121(1), 29; https://doi.org/10.3390/engproc2025121029
Published: 21 January 2026
(This article belongs to the Proceedings of The 17th International Scientific Conference on Aerospace, Automotive, and Railway Engineering)
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Abstract

This study investigates the aerodynamics of Romanian engineer Aurel Persu’s car through wind tunnel experiments involving force measurements, Particle Image Velocimetry (PIV), and CFD simulations. Tests using scale models revealed significant flow separation behind the cabin. The measured drag coefficient is CD = 0.364 at 33 m/s, showing moderate sensitivity to Reynolds number. CFD simulations using the unsteady STAR CCM+ solver with a k-ω SST turbulence model produced a slightly lower drag coefficient (CD = 0.353) due to delayed separation. The good agreement between experimental and numerical results validates the modeling approach and highlights aerodynamic limitations around the front and roof. Despite these limitations, the model achieved aerodynamic performance that was exceptional for its time and remained competitive with mainstream production vehicles well into the latter half of the 20th century.
Keywords: car aerodynamics; wind tunnel testing; PIV; CFD; flow separation; drag coefficient; Aurel Persu car car aerodynamics; wind tunnel testing; PIV; CFD; flow separation; drag coefficient; Aurel Persu car

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MDPI and ACS Style

Clenci, A.; Danlos, A.; Dobrev, I.; Iorga-Simăn, V. On the Aerodynamic Characteristics of the Aurel Persu Car. Eng. Proc. 2026, 121, 29. https://doi.org/10.3390/engproc2025121029

AMA Style

Clenci A, Danlos A, Dobrev I, Iorga-Simăn V. On the Aerodynamic Characteristics of the Aurel Persu Car. Engineering Proceedings. 2026; 121(1):29. https://doi.org/10.3390/engproc2025121029

Chicago/Turabian Style

Clenci, Adrian, Amélie Danlos, Ivan Dobrev, and Victor Iorga-Simăn. 2026. "On the Aerodynamic Characteristics of the Aurel Persu Car" Engineering Proceedings 121, no. 1: 29. https://doi.org/10.3390/engproc2025121029

APA Style

Clenci, A., Danlos, A., Dobrev, I., & Iorga-Simăn, V. (2026). On the Aerodynamic Characteristics of the Aurel Persu Car. Engineering Proceedings, 121(1), 29. https://doi.org/10.3390/engproc2025121029

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