Experimental study on Ahmed’s body drag coefficient

• Autorzy: Wysocki Dominik , Szymanek Arkadiusz

Identyfikatory

DOI

10.31648/ts.7897

• Języki publikacji: EN

Abstrakty

EN

The work presents an experimental designation of the aerodynamic drag coefficient for two configurations of the Ahmed body model, with slant angle of 25° and with the inactive synthetic jet generator. When analyzing the aerodynamic drag of vehicles, most authors focus on higher Reynolds numbers, describing lower values only by designated trend lines. Which is why the main contribution of this experimental work was to designate the Ahmed’s body drag coefficient for low Reynolds numbers and to verify the obtained results with other authors experiments especially with the trend lines for Reynolds number in the range 0,35x10⁵ – 1,8x10⁵. For data taken from the literature, it can be seen that the value of the drag coefficient for the Ahmed body model decreases when the Reynolds number increases. The results obtained during the experiment show the opposite tendency.

Słowa kluczowe

EN

Ahmed body; aerodynamics; wind tunnel; drag coefficient; boundary layer

• Wydawca: Wydawnictwo Uniwersytetu Warmińsko-Mazurskiego w Olsztynie
• Czasopismo: Technical Sciences / University of Warmia and Mazury in Olsztyn
• Rocznik: 2022
• Tom: nr 25(1)
• Strony: 87--105
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Wysocki Dominik

• Katedra Maszyn Cieplnych, Wydział Inżynierii Mechanicznej i Informatyki, Politechnika Częstochowska, al. Armii Krajowej 21, 42-201 Częstochowa

• https://orcid.org/0000-0002-1990-5382

autor

Szymanek Arkadiusz

• Department of Thermal Machinery, Faculty of Mechanical Engineering and Computer Science, University of Technology, Częstochowa

• https://orcid.org/0000-0002-4235-2368

Bibliografia

• Ahmed, S. R., G. Ramm, and G. Faltin. 1984. Some salient features of the time-averaged ground vehicle wake. SAE Transactions, 93:473–503.
• Bello F. 2011. Numerical study of Ahmed body. Universidad de Malaga.
• Bello-Millán F. J., Mäkelä T., Parras L., del Pino C., Ferrera C. 2016. Experimental study on Ahmed's body drag coefficient for different yaw angles. Journal of Wind Engineering and Industrial Aerodynamics, 157:140-144. doi: 10.1016/j.jweia.2016.08.005
• Cui W., Zhu H., Xia C., Yang Z. 2015. Comparison of Steady Blowing and Synthetic Jets for Aerodynamic Drag Reduction of a Simplified Vehicle. Procedia Engineering, 126:388-392. doi: 10.1016/j.proeng.2015.11.224
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• Maho H. 2016. Concepts for generating lateral aerodynamic forces by means of an asymmetric airflow. AIRSHAPER Department of Computational Fluid Dynamics.
• Mäkelä T. 2013. Experimental study of the flow around the Ahmed body. Universidad de Malaga.
• Meile W., Brenn G., Reppenhagen A., Lechner B., Fuchs A. 2011. Experiments and numerical simulations on the aerodynamics of the Ahmed body. CFD Letters, 3(1).
• Piechna J. 2000. Fundamentals of vehicle aerodynamics. Wydawnictwo Komunikacji i Łączności. Warsaw (in Polish).
• Schlichting H., Gersten K. 2000. Boundary-Layer Theory. Springer, 8th edition:29-50. doi: 10.1007/978-3-642-85829-1
• Shadmani S., Mousavi Nainiyan S. M., Ghasemiasl R. 2018. Experimental study of flow control over an Ahmed body using plasma actuator. Mechanics and Mechanical Engineering, 22(1):239-251.
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• Talay T. A. 1975. Introduction to the aerodynamics of flight. NASA History Division, Washington, D. C.
• Thacker A., Aubrun S., Leroy A., Devinant P. 2012. Effects of suppressing the 3D separation on the rear slant on the flow structures around an Ahmed body. Journal of Wind Engineering and Industrial Aerodynamics, 107-108:237-243. doi: 10.1016/j.jweia.2012.04.022
• Wysocki D. 2020. Experimental studies to reduce the aerodynamic drag of a vehicle model using “synthetic jet”. Mateusz Weiland Network Solutions, Poszerzamy horyzonty, 21(3):83-99 (in Polish).
• Wang B., Yang Z., Zhu H. 2019. Active flow control on the 25° Ahmed body using a new unsteady jet. International Journal of Heat and Fluid Flow, 79:108459. doi: 10.1016/j.ijheatfluidflow.2019.108459
• Zhu L. D., Li L., Xu Y. L., Zhu Q. 2012. Wind tunnel investigations of aerodynamic coefficients of road vehicles on bridge deck. Journal of Fluids and Structures, 30:35-50. doi: 10.1016/j.jfluidstructs.2011.09.002

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)