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Turbulence Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence Heat and Mass Transfer
September, 14-18, 2009, Rome, Italy

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf


ISBN Print: 978-1-56700-262-1

ISSN: 2377-2816

Drag Reduction for Trucks by Active Flow Control of the Wake Behind the Trailer

page 12
DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1380
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SINOPSIS

Several hundred large-eddy simulations with active flow control have been carried out to propose a novel rear end of a trailer. It is found that a reduction of aerodynamic drag by up to 25% or more is achieved for certain configurations. The reduction is mainly the result of a pressure recovery on the flap surface and the rear end of the trailer. The parameters of the novel rear end geometry and the variables of AFC are investigated. A thorough analysis of the mechanism of flow control and the flow characteristics of the forced and unforced case is reorted.

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