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Effects on Aerodynamic Drag Reduction of a Passenger Car by Rear Body Shape Modifications  

Song, Ki-Sun (School of Mechanical and Aerospace Engineering, Seoul National University)
Kang, Seung-On (School of Mechanical and Aerospace Engineering, Seoul National University)
Jun, Sang-Ook (School of Mechanical and Aerospace Engineering, Seoul National University)
Park, Hoon-Il (School of Mechanical and Aerospace Engineering, Seoul National University)
Kee, Jung-Do (School of Mechanical and Aerospace Engineering, Seoul National University)
Kim, Kyu-Hong (School of Mechanical and Aerospace Engineering, Seoul National University)
Lee, Dong-Ho (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.19, no.4, 2011 , pp. 137-145 More about this Journal
Abstract
This paper suggests possible rear body shape modifications of a passenger car for the improvement of aerodynamic performance, based on the CFD analysis results. YF SONATA, a passenger car of Hyundai Motors Company, plays a major role as the baseline car in this research. Representatively, three parts(trunk rear edge, side rear edge and rear undercover) are modified in a small range in order for the total outer shapes not to be changed enough so that the modified car is not considered different, compared with the baseline. Specifically, using computational fluid dynamics, aerodynamic drag reduction is accomplished maximally about 11% in this research. Finally, it is proved that although the range of changes of the rear body shapes of a passenger car is very strictly confined, by changing a small range of rear body shapes alone the enhancement of aerodynamic performance of a passenger car can be significantly accomplished.
Keywords
Computational fluid dynamics; YF SONATA; Drag coefficient; COANDA-effect; Trunk rear edge; Side rear edge; Rear undercover;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 J.-L. Aider, J.-F. Beaudoin and J. E. Wesfreid, "Drag and Lift Reduction of a 3D Bluff-body Using Active Vortex Generators," Experiments in Fluids, Vol.48, No.5, pp.771-789, 2010.   DOI   ScienceOn
2 K. S. Song, S. O. Kang, H. I. Park, J. D. Kee, K. H. Kim and D. H. Lee, "External Flow Simulation of a Passenger Car for Drag Reduction," Annual Conference Proceedings, KSAE, pp.1116-1125, 2010.
3 S. O. Kang, S. O. Jun, H. I. Park, Y. C. Ku, J. D. Kee, D. H. Hong, K. H. Kim and D. H. Lee, "Influence of Rotating Wheel and Moving Ground Condition to Aerodynamic Performance of 3-Dimensional Automobile Configuration," Transactions of KSAE, Vol.18, No.5, pp.100- 107, 2010.
4 S. H. Yun, Numerical Study of the Crosswind Safety on Korean Tilting Train Express, M. S. Thesis, Seoul National University, Seoul, Korea, 2004.
5 W. H. Hucho, Aerodynamics of Road Vehicles from Fluid Mechanics to Vehicle Engineering, SAE, 4th Edn., U.S.A, 1998.
6 Y. C. Ku, J. H. Rho, S. H. Yun, T. Y. Kim and D. H. Lee, "A Study on the Reliable Design of Automobile Aerodynamic Performance using the MCS," Spring Conference Proceedings, KSAE, pp.1326-1331, 2006.
7 C. H. Kim and C. B. Youn, "Aerodynamic Effect of Roof-fairing System on a Heavy Duty Truck," Int. J. Automotive Technology, Vol.6, No.3, pp.221-227, 2005.
8 C.-H. Chien, J.-Y. Jang, Y.-H. Chen and S.-C. WU, "3-D Numerical and Experimental Analysis for Airflow Within a Passenger Compartment," Int. J. Automotive Technology, Vol.9, No.4, pp.437-445, 2008.   DOI   ScienceOn
9 J. D. Kee, M. S. Kim and B. C. Lee, "The COANDA Flow Control and Newtonian Concept Approach to Achieve Drag Reduction of Passenger Vehicle," SAE 2001-01-1267, 2001.
10 S. O. Kang, S. O. Jun, H. I. Park, Y. C. Ku, J. D. Kee, K. H. Kim and D. H. Lee, "CFD Flow Simulation and Aerodynamic Performance Prediction Around 3-D automobile Configuration Represented by Vehicle Modeling Function," Annual Conference Proceedings, KSAE, pp.1306-1312, 2009.
11 M. S. Oh, H. J. Lee and S. J. Kang, "CFD Study of the Effects of the Underbody and Rear Spoiler on the External Aerodynamic Characteristics of a Sedan," Fall Conference Proceedings, KSAE, pp.193-199, 1993.
12 D. Geropp and H. -J. Odenthal, "Drag Reduction of Motor Vehicles by Active Flow Control Using the Coanda Effect," Experiments in Fluids, Vol.28, No.1, pp.74-85, 2000.   DOI   ScienceOn
13 J. S. Kim, S. Kim, J. Sung, J. S. Kim and J. Choi, "Effects of an Air Spoiler on the Wake of a Road Vehicle by PIV Measurements," Journal of Visualization, Vol.9, No.4, pp.411-418, 2006.   DOI   ScienceOn
14 E. Wassen, S. Eichinger and F. Thiele, "Simulation of Active Drag Reduction for a Square- Back Vehicle," Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol.108, Active Flow Control II, pp.241-255, 2010.