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Large Eddy Simulation Exploration of Passive Flow Control Around an Ahmed Body

Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära)
Journal of Fluids Engineering - Trancactions of The ASME (0098-2202). Vol. 136 (2014), 12,
[Artikel, refereegranskad vetenskaplig]

Large eddy simulations (LES) are used to study passive flow control for drag reduction in a simplified ground vehicle. Add-on devices in the form of short cylinders are used for the formation of streaks in the streamwise direction that lead to the separation delay. The results of the present numerical simulations are compared with the experimental data and show good agreement. The two-stage flow control mechanism is analyzed from the LES results. It was found to be in agreement with the previous experimental observations that the counter-rotating vortices behind the impinging devices influence the separation only indirectly through the longitudinal vortices further downstream.



Denna post skapades 2014-12-15. Senast ändrad 2015-11-18.
CPL Pubid: 208138

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur