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Optimization of the aerodynamic performance of vehicles using the z-f turbulence model and response surface models

Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; Hassan Hemida (Institutionen för tillämpad mekanik, Strömningslära) ; Branislav Basara (Institutionen för tillämpad mekanik, Strömningslära) ; Jurgen Schneider
“Robust design through simulation”, Paris La Defense-Pole Leonard de Vinci, Paris, France, October 16th, 2008 p. 9. (2008)
[Konferensbidrag, övrigt]

An efficient optimization strategy that uses steady Navier-Stokes simulations with the z-f turbulence model and response surface approximations of the objectives was demonstrated. The optimization was applied on a bus model with the aim to improve its cross-wind stability and to decrease its air resistance. Response surface models, based on both polynomial approximations and radial basis neural networks, were used and compared. The bus design with sharp vertical edges and largest angle of the upper half of the top face (in respect to the vertical front plane) was found to be the best for the cross-wind stability. The most rounded vertical edges and the largest angle of the upper half of the top face resulted in the smallest drag of the bus. Both these results are in a good agreement with the previous experimental study. The present work shows that the proposed optimization procedure is reliable and useful for optimization of aerodynamic properties of ground vehicles

Nyckelord: vehicle shape optimization, response surface, bus aerodynamics, RANS

Denna post skapades 2008-12-15. Senast ändrad 2014-09-29.
CPL Pubid: 81556


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära



Chalmers infrastruktur