1996-02-01

Aerodynamics Overview of the Ground Transportation Systems (GTS) Project for Heavy Vehicle Drag Reduction 960906

The focus of the research was to investigate the fundamental aerodynamics of the base flow of a tractor trailer that would prove useful in fluid flow management Initially, industry design needs and constraints were defined This was followed by an evaluation of state-of-the-art Navier-Stokes based computational fluid dynamics tools Analytical methods were then used in combination with computational tools in a design process Several geometries were tested at 1 8 scale in a low speed wind tunnel in addition to the baseline geometry, base add-on devices of the class of ogival boattails and slants were analyzed

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