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Flow around a Heavy Vehicle in a Side Wind
Technical Paper
2019-01-5019
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
Automotive Technical Papers
Language:
English
Abstract
Driving stability can be an issue for heavy vehicles. In a side wind, a side force and rolling moment will develop, and they both affect driving stability, from which the vehicle may overturn. It is important to understand the flow structure in order to prevent a truck from rolling over. The main purpose of this study is to investigate the flow around a heavy vehicle that causes it to overturn. A 1/8 scaled, simplified tractor/trailer configuration called the Ground Transportation System (GTS) with Reynolds number (based on the GTS width) equal to 1.6 × 106 was used for this study. A side wind was modeled by turning the GTS model with respect to its moment reference point. A triangular mesh was used for the truck and the computational domain surfaces, while hybrid meshes filled the computational domain volume. The Ansys® CFX code based on the k-ω shear stress transport (SST) turbulence model was used to solve the governing equations numerically for an incompressible fluid. All results were averaged for 50 shedding periods. The simulation was done for yaw angles of 0-14°, and the results were compared with experimental data from the literature. To model an open road, a moving-ground boundary condition was implemented in the simulation. The computational fluid dynamics calculations for the drag, side force, and rolling moment coefficient had more than 90% accuracy. The other aerodynamic coefficients had larger discrepancies due to the moving-ground boundary condition and an under-prediction of the pressure distribution on the front corner radius of the GTS. In general, it was found that the present simulation can capture the trends for most aerodynamic coefficients. This study showed that the rolling moment, which determines the tendency to overturn, is sensitive to the spanwise pressure at the rear of the vehicle.
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Authors
Topic
Citation
Levin, J. and Chen, S., "Flow around a Heavy Vehicle in a Side Wind," SAE Technical Paper 2019-01-5019, 2019, https://doi.org/10.4271/2019-01-5019.Also In
References
- Croll , R. , Gutierrez , W. , Hassan , B. , Suazo , J. et al. Experimental Investigation of the Ground Transportation Systems (GTS) Project for Heavy Vehicle Drag Reduction SAE Technical Paper 960907 1996 10.4271/960907
- Gutierrez , W. , Hassan , B. , Croll , R. , and Rutledge , W. Aerodynamics Overview of the Ground Transportation Systems (GTS) Project for Heavy Vehicle Drag Reduction SAE Technical Paper 960906 1996 10.4271/960906
- Storms , B. , Ross , J. , Heineck , J. , Walker , S. et al. 2001
- Salari , K. , Ortega , J. , and Castellucci , P. Computational Prediction of Aerodynamic Forces for a Simplified Integrated Tractor-Trailer Geometry 34th AIAA Fluid Dynamics Conference and Exhibit USA 28 June-1 July 2004 10.2514/6.2004-2253
- Roy , C. , Payne , J. , and McWherter-Payne , M. RANS Simulations of a Simplified Tractor/Trailer Geometry Journals of Fluids Engineering 128 5 1083 1089 2006 10.1115/1.2236133
- Maddox , S. , Squires , K. , Wurtzler , K. , and Forsythe , J. Detached-Eddy Simulation of the Ground Transportation System The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, Lecture Notes in Applied and Computational Mechanics 19 89 104 2004 10.1007/978-3-540-44419-0_8
- Baker , C. High Sided Articulated Road Vehicles in Strong Cross Winds Journal of Wind Engineering and Industrial Aerodynamics 31 1 67 85 1988 10.1016/0167-6105(88)90188-2
- Hargreaves , D. , Morvan , H. , and Wright , N. CFD Modeling of High-Sided Vehicles in Cross-Winds The Fourth International Symposium on Computational Wind Engineering (CWE 2006) Japan July 16-19, 2006
- Sterling , M. , Quinn , A. , Hargreaves , D. , Cheli , F. et al. A Comparison of Different Methods to Evaluate the Wind Induced Forces on a High Sided Lorry Journal of Wind Engineering and Industrial Aerodynamics 98 1 10 20 2010 10.1016/j.jweia.2009.08.008
- Hu , X. , Peng , Q. , Lei , L. , Peng , G. et al. Numerical Simulation of the Aerodynamic Characteristics of Heavy-Duty Trucks Through Viaduct in Crosswind Journal of Hydrodynamics, Ser. B. 26 3 394 399 2014 10.1016/S1001-6058(14)60044-5
- Wang , B. , Xu , Y. , Zhu , L. , and Li , Y. Crosswind Effect Studies on Road Vehicle passing by Bridge Tower Using Computational Fluid Dynamics Engineering Applications of Computational Fluid Mechanics 8 3 330 344 2014 10.1080/19942060.2014.11015519
- Menter , F. Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications AIAA Journal 32 8 1598 1605 1994 10.2514/3.12149
- Ansys® CFX (Version 11.0) 2006
- Ansys® ICEM CFD (Version 11.0) 2006
- Garry , K.P. Some Effects of Ground Clearance and Ground Plane Boundary Layer Thickness on the Mean Base Pressure of a Bluff Vehicle Type Body Journal of Wind Engineering and Industrial Aerodynamics 62 1 1 10 1996 10.1016/S0167-6105(96)00054-2
- White , F.M. Fluid Mechanics Seventh New York McGraw-Hill 2011 458 9780073529349