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Computational Simulation of Tractor-Trailer Gap Flow with Drag-Reducing Aerodynamic Devices
Technical Paper
2005-01-3625
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Computational simulations of the Modified Ground Transportation System1 (M-GTS), a 1/14th-scale simplified tractor-trailer geometry, are performed at both laboratory and full-scale Reynolds numbers using the NASA overset grid code OVERFLOW2. Steady Reynolds' Averaged Navier-Stokes (RANS) simulations are conducted to deepen the understanding of tractor-trailer gap flow structure, and to ascertain the time-averaged efficacy of tractor cab extenders and trailer-face splitter plates in reducing aerodynamic drag in typical crosswinds. Results of lab-scale simulations compare favorably to body force and particle image velocimetry (PIV) data obtained from University of Southern California (USC) experiments for two tractor-trailer gap lengths. Full-scale simulations highlight model geometry limitations and allude to the use of splitter plates in place of, or in conjunction with, tractor cab extenders.
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Citation
Castellucci, P. and Salari, K., "Computational Simulation of Tractor-Trailer Gap Flow with Drag-Reducing Aerodynamic Devices," SAE Technical Paper 2005-01-3625, 2005, https://doi.org/10.4271/2005-01-3625.Also In
Heavy Vehicle Drag Reduction-Overviews, Multiple Trailer-Mounted Devices; Tires, Splash and Spray and Emissions; Full Scale Assessments
Number: SP-1985; Published: 2005-11-01
Number: SP-1985; Published: 2005-11-01
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