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Investigation and Development of Underbody Aerodynamic Drag Reduction Devices for Trailer Trucks
Technical Paper
2018-01-0707
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
It is well known that the underbody region of a tractor-trailer is responsible for up to 30% of the aerodynamic drag. This is the highest drag created by any region of a tractor-trailer. There are a number of underbody drag-reduction devices available on the market but they create a few operational issues, such as low ground clearance and ice collection, which inhibit their mass market appeal. In this paper, a novel concept of an underbody aerodynamic device is developed and investigated. The underbody device is a combination of a ramp and a side skirt; which are optimized simultaneously. In addition, the device is made collapsible to facilitate easy storage when not in use (i.e., city driving). NASA’s Generic Conventional Model (GCM); a 1/8th scale model of a generic class-8 tractor-trailer is used to evaluate and optimize the concept. The GCM allows the concept to be applicable to a wider range of tractor-trailers. The studies were conducted using the RANS based turbulence model, k-ω SST in ANSYS Fluent. The simulations were validated with NASA’s experimental data on the GCM model; which include the surface pressure coefficients and a drag coefficient of the model. The results showed that the underbody device decreased the overall drag coefficient by 4.1%. In addition, the adverse negative pressure region in the wake was significantly reduced.
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Ibrahim, M. and Agelin-chaab, M., "Investigation and Development of Underbody Aerodynamic Drag Reduction Devices for Trailer Trucks," SAE Technical Paper 2018-01-0707, 2018, https://doi.org/10.4271/2018-01-0707.Data Sets - Support Documents
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References
- McCallen , R.C. , Salari , K. , Ortega , J.M. , DeChant , L.J. , Hassan , B. , Roy , C.J. , Pointer , W.D. , Browand , F. , Hammache , M. , Hsu , T.-Y. , Leonard , A. , Rubel , M. , Chatalain , P. , Englar , R. , Ross , J. , Satran , D. , Heineck , J.T. , Walker , S. , Yaste , D. , and Storms , B. DOE’s effort to reduce truck aerodynamic drag - joint experiments and computations lead to smart design 34th AIAA Fluid Dyn. Conf. Exhib July 1-16, 2004 10.4271/2005-01-3511
- U.S. Energy Information Administration How much carbon dioxide is produced from burning gasoline and diesel fuel? https://www.eia.gov/tools/faqs/faq.php?id=307&t=11 2017
- Cooper , K.R. Commercial Vehicle Aerodynamic Drag Reduction: Historical Perspective as a Guide BT McCallen , R. , Browand , F. , and Ross , J. The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains Springer Berlin, Heidelberg ISBN 978-3-540-44419-0 9 28 2004
- Cooper , K.R. SAE Tech. Pap. 2003-01-3376 2003 10.4271/2003-01-3376
- Choi , H. , Lee , J. , and Park , H. Aerodynamics of Heavy Vehicles Annual Review of Fluid Mechanics 46 1 441 468 2014 10.1146/annurev-fluid-011212-140616
- Ortega , J.M. and Salari , K. Heavy Veh. Syst. Optim. Progr. - FY 2008 Annual Report 241 2008 10.4271/2008-01-2601
- Drollinger , R. SAE Tech. Pap. Ser. 1987 10.4271/870001
- Sovran , G. Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles Springer 1978 10.1007/978-1-4684-8434-2
- West , G.S. and Apelt , C.J. The Effects of Tunnel Blockage and Aspect Ratio on the Mean Flow Past a Circular Cylinder with Reynolds Numbers between 10 4 and 10 5 Journal of Fluid Mechanics 114 361 377 1982 10.1017/S0022112082000202
- Leuschen , J. and Mébarki , Y. Examination of the Maskell III Blockage Correction Technique for Full Scale Testing in the NRC 9-Meter Wind Tunnel SAE International Journal of Commercial Vehicles 5 2 640 649 2012 10.4271/2012-01-2047
- Storms , B.L. , Satran , D.R. , Heineck , J.T. , and Walker , S.M. A Summary of the Experimental Results for a Generic Tractor-Trailer in the Ames Research Center 7- by 10-Foot and 12-Foot Wind Tunnels CA Moffett Field 2006
- Menter , F. Zonal Two Equation k-w Turbulence Models For Aerodynamic Flows 23rd Fluid Dynamics, Plasmadynamics, and Lasers Conference 103975 1993 10.2514/6.1993-2906
- Pointer , W. Evaluation of Commercial CFD Code Capabilities for Prediction of Heavy Vehicle Drag Coefficients 34th AIAA Fluid Dyn. Conf. Exhib July 1-10 2004 10.2514/6.2004-2254
- Lauwers , K. Computational and Experimental Analysis of Trailer Shape Modifications for Drag Reduction Delft University of Technology 2009
- ANSYS ANSYS Fluent 2017
- CD-ADAPCO Group