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http://dx.doi.org/10.6112/kscfe.2014.19.2.066

A NUMERICAL STUDY ON THE EFFECT OF VEHICLE-TO-VEHICLE DISTANCE ON THE AERODYNAMIC CHARACTERISTICS OF A MOVING VEHICLE  

Kim, D.G. (Graduate School of Industry Seoul National Univ. of Science and Technology)
Kim, C.H. (Department of Mechanical & Automotive Engineering Seoul National Univ. of Science & Technology)
Publication Information
Journal of computational fluids engineering / v.19, no.2, 2014 , pp. 66-71 More about this Journal
Abstract
Aerodynamic design of a vehicle has very important meaning on the fuel economy, dynamic stability and the noise & vibration of a moving vehicle. In this study, the correlation of aerodynamic effect between two model vehicles moving inline on a road was studied with the basic SAE model vehicle. Drag and lift are two main physical forces acting on the vehicle and both of them directly effect on the fuel economy and driving stability of the vehicle. For the research, the distance between two vehicles is varied from 5m to 30m at the fixed vehicle speed, 100km/h and the side-wind was assumed to be zero. The main issue for this numerical research is on the understanding of the interaction forces; lift and drag between two vehicles formed inline. From the study, it was found that as the distance between two vehicles is closer, the drag force acting on both the front and rear vehicle decreases and the lift force has same trend for both vehicle. As the distance(D) is 5m, the drag of the front vehicle reduced 7.4% but 28.5% for the rear-side vehicle. As the distance is 30m, the drag of the rear vehicle is still reduced to 22% compared to the single driving.
Keywords
aerodynamic drag; pressure drag; induced drag; surface friction drag; CFD; automotive aerodynamics;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 1998, Kim, C.H., Yun. D.G. and Lee C.M., "A Numerical Study on the Aerodynamic Effects of a Rear-Side Spoiler on the Driving Stability of a Passenger Car," Journal of SNUT, Vol.47.
2 2005, Kim, C.H. and Youn, C.B., "Aerodynamic Effect of Roof-Fairing System on a Heavy-duty Truck," IJAT, Vol.6, No.3, pp.221-227.
3 2004, Geoffrey M. Le Good and Kevin P. Garry "On the Use of Reference Models in Automotive Aerodynamics," 2004 SAE World Congress, March 2004.
4 1996, Barnard, R.H., Road Vehicle Aerodynamic Design, Addison Wesley Longman Ltd.
5 2011, PHOENICS Technical Report (TR/326), Concentration Heat And Momentum Limited.
6 2001, Douglas, J.F., Fluid Mechanics, Prentice Hall, pp.406-447.
7 1980, Patankar, S.V., Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corp.