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LES of the flow around several cuboids in a row

David Uystepruyst (Institutionen för tillämpad mekanik, Strömningslära) ; Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära)
International Journal of Heat and Fluid Flow (0142-727X). Vol. 44 (2013), p. 414-424.
[Artikel, refereegranskad vetenskaplig]

This paper presents Large Eddy Simulations (LES) of flow around a four-vehicle platoon when one of the platoon members was forced to undergo in-line oscillations. The LES were made at the Reynolds number of 10(5) based on the height of the vehicles. Combinations of two different frequencies corresponding to non-dimensional frequencies at the Strouhal numbers St(1) = 0.025 and St(2) = 0.013 and two oscillation amplitudes were used in this study. The methodology was validated by comparisons with data from previous experimental investigations. In order to highlight the dynamic effects, comparisons were made with steady results on a single vehicle and on a four-vehicle platoon. Large differences were found in the flow structures between quasi-steady and dynamic results. Furthermore, the behavior of the drag coefficient of the upstream neighbor of the oscillating model was investigated. (C) 2013 Elsevier Inc. All rights reserved.

Nyckelord: Unsteady vehicle aerodynamics, LES, Grid deformation, Platooning, Vehicle, Hysteresis, LARGE-EDDY SIMULATION, BLUFF-BODIES, AERODYNAMICS



Denna post skapades 2014-02-06. Senast ändrad 2016-10-06.
CPL Pubid: 193550

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Maskinteknik

Chalmers infrastruktur