Microsystem Technologies

, Volume 24, Issue 11, pp 4453–4463 | Cite as

Computational analysis of air jet wheel deflector for aerodynamic drag reduction of road vehicle

  • Sang Wook LeeEmail author
Technical Paper


A concept of an air jet wheel deflector is employed to reduce vehicle aerodynamic drag. The drag reduction mechanism of the air jet wheel deflector is as follow: When the vehicle’s driving speed is over than predetermined value, the air jet system injects air in the perpendicular direction to the free stream flow. This air jet acts as an air curtain, which reduces the aerodynamic drag by deflecting the free stream flow away from the tire. Feasibility study was performed using state of the art computational fluid dynamics (CFD) technique based on the lattice Boltzmann method. Fabijanic’s simple vehicle model is used for the validation of current CFD technique and numerical study of both the conventional wheel deflector and newly proposed air jet wheel deflector. Parametric studies reveal that the air jet wheel deflector system effectually reduces vehicle aerodynamic drag up to 6.4%, while conventional wheel deflector leads to slight diminishment of aerodynamic drag of 3.6%. From this finding, it can be concluded that air jet wheel deflector is a useful device to reduce aerodynamic drag of automobile.



This study was supported by research fund from Honam University, 2017.


  1. Cho J, Kim T, Kim K, Yee K (2017) Comparative investigation on the aerodynamic effects of combined use of underbody drag reduction devices applied to real sedan. Int J Autom Technol 18:959–971CrossRefGoogle Scholar
  2. Duncan B, Senthooran S, Hendriana D, Sivakumar P et al (2007) Multi-disciplinary aerodynamics analysis for vehicles: application of external flow simulations to aerodynamics, aeroacoustics and thermal management of a pickup truck. SAE technical paper 2007-01-0100Google Scholar
  3. El-Shakawy A, Kamrad J, Lounsberry T, Baker G (2011) Evaluation of impact of active grille shutter on vehicle thermal management. SAE Int J Mater Manuf 4:1244–1254CrossRefGoogle Scholar
  4. Fabijanic J (1996) An experimental investigation on wheel-well flows. SAE paper 960901:161–172Google Scholar
  5. Hwang B, Lee S, Lee E, Kim J, Kim M, You D, Lee S (2016) Reduction of drag in heavy vehicles with two different types of advanced side skirts. J Wind Eng Ind Aerodyn 115:36–46CrossRefGoogle Scholar
  6. Kim JM, Kim KM, Ha SJ, Kim MS (2016) Grille design for passenger car to improve aerodynamic and cooling performance using CFD technique. Int J Autom Technol 17:967–976CrossRefGoogle Scholar
  7. Krajnovic S, Sarmast S, Basara B (2011) Numerical investigation of the flow around a simplified wheel in a wheelhouse. J Fluids Eng 133:111001CrossRefGoogle Scholar
  8. Kumar A, Singh A, Regin AF (2015) Study on effect of ground clearance on performance of aerodynamic drag reduction devices for passenger vehicle using CFD simulations. SAE technical paper 2015-26-0197Google Scholar
  9. Mestiri R, Ahmed-Bensoltane A, Keirsbulck L, Aloui F, Labraga L (2014) Active flow control at the rear end of a generic car model using steady blowing. J Appl Fluid Mech 7:565–571Google Scholar
  10. Mohamed-Kassim Z, Filippone J (2010) Fuel savings on a heavy vehicle via aerodynamic drag reduction. Transp Res Part D 15:275–284CrossRefGoogle Scholar
  11. Pfeifer C (2014) Evolution of active grill shutters. SAE technical paper 2014-01-0633Google Scholar
  12. Regert T, Lajos T (2004) Numerical simulation of flow field in wheelhouse of cars. J Comput Appl Mech 5:1–8Google Scholar
  13. Regert T, Lajos T (2007) Description of flow field in the wheelhouses of cars. Int J Heat Fluid Flow 28:616–629CrossRefGoogle Scholar
  14. Sebben S (2004) Numerical simulation of a car underbody: effect of front wheel deflectors. SAE technical paper 2004-01-1307Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Automotive EngineeringHonam UniversityKwangju-siRepublic of Korea

Personalised recommendations