The Accuracy of the Numerical Solution in Predicting Ahmed Body Components Drag Coefficients
DOI:
https://doi.org/10.37934/cfdl.14.5.2432Keywords:
K-epsilon, K-omega SST, SST, ANSYS Fluent, AHMED BODYAbstract
In recent years, the aerodynamic drag became a major interest of automotive industry as it is one of the main components affecting the fuel consumption. To reduce aerodynamic drag force and improve the energetic efficiency, a complete understanding of the flow around ground vehicles is highly required. This study focused on the accuracy of a three different turbulence models in predicting Ahmed body components drag coefficients. Ahmed Body is a simplified model which mimics the bluff bodies in automotive aerodynamics. This study uses ANSYS Fluent to simulate the flow around Ahmed Body. Three different turbulence models (K-epsilon, K-omega SST and SST) were used in the study. The drag coefficient components for the different sections of the model were validated with the experimental published data. The results have shown that the SST model predicted accurately the total drag coefficient but failed to provide good agreement for the components drag coefficients.
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Mukut, A. N. M. Mominul Islam, and Mohammad Zoynal Abedin. "Review on aerodynamic drag reduction of vehicles." International Journal of Engineering Materials and Manufacture 4, no. 1 (2019): 1-14. https://doi.org/10.26776/ijemm.04.01.2019.01
Sudin, Mohd Nizam, Mohd Azman Abdullah, Shamsul Anuar Shamsuddin, Faiz Redza Ramli, and Musthafah Mohd Tahir. "Review of research on vehicles aerodynamic drag reduction methods." International Journal of Mechanical and Mechatronics Engineering 14, no. 02 (2014): 37-47.
Lee, Sang Wook. "Computational analysis of air jet wheel deflector for aerodynamic drag reduction of road vehicle." Microsystem Technologies 24, no. 11 (2018): 4453-4463. https://doi.org/10.1007/s00542-018-3992-1
Shankar, G., and G. Devaradjane. "Experimental and computational analysis on aerodynamic behavior of a car model with vortex generators at different yaw angles." Journal of Applied Fluid Mechanics 11, no. 1 (2018): 285-295. https://doi.org/10.29252/jafm.11.01.28357
Zakher, Bassem Nashaat, Mostafa El-Hadary, and Andrew Nabil Aziz. "The Effect of Vortex Generators on Aerodynamics for Sedan Cars." CFD Letters 11, no. 6 (2019): 1-17.
Kim, Dongri, Hoon Lee, Wook Yi, and Haecheon Choi. "A bio-inspired device for drag reduction on a three-dimensional model vehicle." Bioinspiration & Biomimetics 11, no. 2 (2016): 026004. https://doi.org/10.1088/1748-3190/11/2/026004
Tian, Jie, Yingchao Zhang, Hui Zhu, and Hongwei Xiao. "Aerodynamic drag reduction and flow control of Ahmed body with flaps." Advances in Mechanical Engineering 9, no. 7 (2017): 1687814017711390. https://doi.org/10.1177/1687814017711390
Unni, T. P. Aniruddhan. Numerical Investigation on Aerodynamic Effects of Vanes and Flaps on Automotive Underbody Diffusers. No. 2017-01-2163. SAE Technical Paper, 2017. https://doi.org/10.4271/2017-01-2163
Cho, Junho, Tae-Kyung Kim, Kyu-Hong Kim, and Kwanjung Yee. "Comparative investigation on the aerodynamic effects of combined use of underbody drag reduction devices applied to real sedan." International Journal of Automotive Technology 18, no. 6 (2017): 959-971. https://doi.org/10.1007/s12239-017-0094-5
Wahba, E. M., Humaid Al-Marzooqi, Majd Shaath, Mohamed Shahin, and Tarek El-Dhmashawy. "Aerodynamic drag reduction for ground vehicles using lateral guide vanes." CFD Letters 4, no. 2 (2012): 68-79.
Ahmed, Syed R., G. Ramm, and Gunter Faltin. "Some salient features of the time-averaged ground vehicle wake." SAE Transactions (1984): 473-503. https://doi.org/10.4271/840300
Korkischko, Ivan, and Julio Romano Meneghini. "Experimental investigation and numerical simulation of the flow around an automotive model: Ahmed body." In Proceedings of COBEM. ABCM, Brasília, 2007.
Hinterberger, Christof, M. Garcia-Villalba, and W. Rodi. "Large eddy simulation of flow around the Ahmed body." In The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, pp. 77-87. Springer, Berlin, Heidelberg, 2004. https://doi.org/10.1007/978-3-540-44419-0_7
Igali, Dastan, Olzhas Mukhmetov, Yong Zhao, Sai Cheong Fok, and Soo Lee Teh. "Comparative analysis of turbulence models for automotive aerodynamic simulation and design." International Journal of Automotive Technology 20, no. 6 (2019): 1145-1152. https://doi.org/10.1007/s12239-019-0107-7
Altaf, Alaman, Ashraf A. Omar, and Waqar Asrar. "Review of passive drag reduction techniques for bluff road vehicles." IIUM Engineering Journal 15, no. 1 (2014): 61-69. https://doi.org/10.31436/iiumej.v15i1.477
Mosiężny, Jędrzej, Bartosz Ziegler, Przemysław Grzymisławski, and Rafał Ślefarski. "Base drag reduction concept for commercial road vehicles." Energy 205 (2020): 118075. https://doi.org/10.1016/j.energy.2020.118075
Mohammadikalakoo, Babak, Paolo Schito, and Mahmoud Mani. "Passive flow control on Ahmed body by rear linking tunnels." Journal of Wind Engineering and Industrial Aerodynamics 205 (2020): 104330. https://doi.org/10.1016/j.jweia.2020.104330
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