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Abstract

The placement of the battery box can have a massive impact on the aerodynamics of an electric vehicle. Although favourable from the viewpoint of vehicle dynamics, an underbody battery box may impair the vehicle aerodynamics. This study aims to quantify the effect of an underbody battery box on the drag force acting on an electric vehicle. Four different variants of the vehicle (original variant, lifted suspension, lifted suspension with an underbody battery box) are investigated by means of computational fluid dynamics. The underbody battery box was found to induce flow separation, resulting in a massive increase in drag force. As a solution, a battery box fairing was designed and tested. The fairing significantly reduced the increase in drag. The results of this study could contribute to the design of more stable and aerodynamically efficient electric vehicles.
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Bibliography

[1] Where the Energy Goes: Electric Cars. US DOE, US EPA. https://www.fueleconomy.gov/feg/atv-ev.shtml (accessed 20 March 2021).
[2] Simmonds N., Pitman J., Tsoutsanis P., Jenkins K., Gaylard A., Jansen W.: Complete body aerodynamic study of three vehicles. SAE Tech. Pap. (2017), 2017-01-1529.
[3] Ahmed S.R. Ramm G., Faltin G.: Some salient features of the time-averaged ground vehicle wake. SAE Transactions 93(1984), 2, 840222–840402, 473–503.
[4] Buchheim R., Deutenbach K.-R., Lückoff H.-J.: Necessity and premises for reducing the aerodynamic drag of future passenger cars. SAE Transactions 90(1981), 1, 810010–810234, 758–771.
[5] Cooper K.R., Bertenyi T., Dutil G. Syms, J. Sovran G.: The aerodynamic performance of automotive underbody diffusers. SAE Tech. Pap. (1998), 980030, 150–179.
[6] Potthoff J.: The aerodynamic layout of UNICAR research vehicle. In: Proc. Int. Symp. on Vehicle Aerodynamics, Wolfsburg, 1982.
[7] Katz J.: Race Car Aerodynamics: Designing for Speed. Bentley, 1995.
[8] Hucho W.: Aerodynamics of Road Vehicles. From Fluid Mechanics to Vehicle Engineering. Butterworth-Heinemann, 1987.
[9] Katz J.: Automotive Aerodynamics. Wiley, 2016. [10] Shinde, Gopal, Aniruddha Joshi, Kishor Nikam.: Numerical investigations of the drivAer car model using opensource CFD solver OpenFOAM. Tata Consult. Serv., Pune, 2013.
[11] DrivAer Model. https://www.mw.tum.de/en/aer/research-groups/automotive/drivaer/ (accessed 15 Apr. 2021).
[12] Jakirlic S., Kutej L., Hanssmann D., Basara B., Tropea C.: Eddy-resolving simulations of the notchback ‘DrivAer’ model: Influence of underbody geometry and wheels rotation on aerodynamic behaviour. SAE Tech. Pap. (2016), 2016-01-1602.
[13] abois M., Lakehal D.: Very-large eddy simulation (V-LES) of the flow across a tube bundle. Nucl. Eng. Des. 241(2011), 6, 2075–2085.
[14] Heft A.: Aerodynamic investigation of the cooling requirements of electric vehicles. PhD thesis, Technische Universität München, Munich 2014.
[15] Heft A.I., Indinger T. Adams N.A.: Introduction of a new realistic generic car model for aerodynamic investigations. SAE Tech. Pap. (2012), 2012-01-0168.
[16] Janssen L.J., Hucho W.H.: The effect of various parameters on the aerodynamic drag of passenger cars. In: Advances in Road Vehicle Aerodynamics (H.S. Stevens, Ed.), 1973. 223-254.
[17] Wright P.G.: The influence of aerodynamics on the design of Formula One racing cars. Int. J. Vehicle Des. 3(1982), 4, 383–397.
[18] Eagle Two. http://lodzsolarteam.p.lodz.pl/index.php/eagle-two/ (accessed 3 May 2021).
[19] Lanfrit M.: Best Practice Guidelines for Handling Automotive External Aerodynamics with Fluent. Fluent Deutschland, Darmstadt 2005.
[20] Ansys Fluent Mosaic – new mesh generation technology incorporating hexahedral and polyhedral elements. Symkom, Łódz 2019. https://symkom.pl/ansys-fluent-mosaic/ (accessed 16 March 2021).
[21] Ansys: Ansys Fluent User’s Guide. 2013.
[22] Schlichting H.: Boundary-Layer Theory. McGraw Hill, 1979.
[23] Miao L., Mack S., Indinger T.: Experimental and numerical investigation of automotive aerodynamics using DrivAer model. In: Proc. ASME 2015 Int. Design Engineering Technical Conferences and Computers and Information in Engineering Conf., Boston, Aug. 2–5, 2015. V003T01A039. ASME.
[24] Heft A.I., Indinger T., Adams N.A.: Experimental and numerical investigation of the DrivAer model. In: Proc. Fluids Engineering Division Summer Meeting, Rio Grande, July 8–12, 2012, FEDSM2012-72272, 41–51. ASME.
[25] Heft A.I., Indinger T., Adams N.: Investigation of unsteady flow structures in the wake of a realistic generic car model. In: Proc. 29th AIAA Applied Aerodynamics Conf., June 2011, 3669.
[26] Ashton N., West A., Lardeau S., Revell A.: Assessment of RANS and DES methods for realistic automotive models. Comput. Fluids 128(2016), 1–15.
[27] Guilmineau E., Deng G., Leroyer A., Queutey P., Wackers J., Visonneau M. (2016, June): Assessment of RANS and DES methods for the Ahmed body. In: Proc. ECCOMAS Cong. 2016 VII Eur. Cong. on Computational Methods in Applied Sciences and Engineering (M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris, Eds.), Crete Island, 5-10 June 2016.
[28] Menter F.R.: Zonal two equation k − ! turbulence models for aerodynamic flows. In: Proc. 23rd Fluid Dynamics, Plasmadynamics, and Lasers Conf., Orlando, 6–9 July 1993, AIAA-93-2906.
[29] Ansys Inc.: Ansys Fluent 12.0 Theory Guide, 2009.
[30] Menter F.R.: Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J 32(1994), 8, 1598–1605.
[31] Sobczak K.: Numerical investigations of an influence of the aspect ratio on the Savonius rotor performance. J. Phys. Conf. Ser. 1101(2018), 1, 012034.
[32] Huang P.G., Bardina J., Coakley T.: Turbulence modeling validation, testing, and development. NASA Tech. Memorand. (1997), 110446, 147.
[33] Pawłucki M., Krys M.: CFD for Engineers. Helion, Gliwice 2020.
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Authors and Affiliations

Jakub Bobrowski
1
Krzysztof Sobczak
1

  1. Institute of Turbomachinery, Lodz University of Technology, 217/221 Wolczanska, 93-005 Łódz Poland

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