Abstract
Aerodynamic development of a full-scale truck presents a challenge for experimental testing due to the scale of the vehicle relative to most wind-tunnel test facilities. Numerical simulation is becoming more prevalent for assessing design changes and improving vehicle aerodynamic drag. In this process, the cumulative effects of small design changes are needed. Furthermore, the drag must be considered both at zero crosswind and with five degrees crosswind yaw angle in order to properly represent typical driving conditions. It is well-known that the aerodynamics of heavy trucks are complicated by a very transient wake flow that causes large fluctuations in base pressure, and therefore in the drag coefficient. This effect is often even more prevalent at non-zero yaw angles. The transient wake flow presents a challenge for effectively using simulation tools to predict the drag effects of small design changes, which may have some influence on the wake flow and base pressure.
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References
Chen, H., Teixeira, C., Molvig, K.: Realization of fluid boundary conditions via discrete Boltzmann dynamics. Int. J. Mod. Phys. C 9(8), 1281 (1998)
Teixeira, C.: Incorporating turbulence models into the lattice-Boltzmann method. Int. J. Mod. Phys. C 9(8), 1159–1175 (1998)
Chen, H., Kandasamy, S., Orszag, S., Shock, R., Succi, S., Yakhot, V.: Extended Boltzmann kinetic equation for turbulent flows. Science 301, 633–636 (2003)
Shock, R., Qian, Y., Chen, H., Zhang, R.: PowerFLOW Simulations for 2D Cavity and Backward Step Flows (2002)
Chen, S., Doolen, G.: Lattice Boltzmann method for fluid flows. Ann. Rev. Fluid Mech. 30, 329–364 (1998)
Lietz, R., Mallick, S., Kandasamy, S., Chen, H.: Exterior airflow simulations using a lattice Boltzmann approach. SAE Paper 2002-01-0596
Fares, E.: Unsteady flow simulation of the Ahmed reference body using a lattice Boltzmann approach. Comput. Fluids 35(8–9). In: Proceedings of the First International Conference for Mesoscopic Methods in Engineering and Science (2006)
Horrigan, K., Duncan, B., Keating, A., Gupta, A., Gargoloff, J.: Aerodynamic simulations of a generic tractor-trailer, validation and analysis of unsteady aerodynamics. SAE Paper 2008-01-2612 (2008)
Fischer, O., Kuthada, T., Mercker, E., Wiedemann, J.: CFD approach to evaluate wind-tunnel and model setup effects on aerodynamic drag and lift for detailed vehicles. SAE Paper 2010-01-0760 (2010)
Duncan, B.D., Golsch, K.: Characterization of separated turbulent flow regions in CFD results for a pontiac NASCAR race car. SAE Paper 2004-01-3556 (2004)
Duell, E.G., George, A.R.: Experimental study of a ground vehicle body unsteady near wake. SAE Technical Paper Series No. 1999-01-0812, Detroit (1999)
Al-Garni, A.M.: Experimental investigation of the flow around a generic SUV. SAE Technical paper Series No. 2004-01-0228, Detroit (2004)
Heinecke, M., Beedy, J., Horrigan, K., Sengupta, R.: Aerodynamics study of a production tractor trailer combination using simulation and wind tunnel methods. SAE Paper 2010-01-2040 (2010)
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Elofsson, P., Mercier, G., Duncan, B.D., Boissinot, S. (2016). Accurate Drag Prediction Using Transient Aerodynamics Simulations for a Heavy Truck in Yaw Flow. In: Dillmann, A., Orellano, A. (eds) The Aerodynamics of Heavy Vehicles III. ECI 2010. Lecture Notes in Applied and Computational Mechanics, vol 79. Springer, Cham. https://doi.org/10.1007/978-3-319-20122-1_22
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DOI: https://doi.org/10.1007/978-3-319-20122-1_22
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