LES Investigation of Passive Flow Control Around an Ahmed Body
Paper i proceeding, 2013

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

Ahmed body

flow control

vehicle aerodynamics

LES

large-eddy simulation

Författare

Sinisa Krajnovic

Chalmers, Tillämpad mekanik, Strömningslära

Proceedings of the ASME 2013 International Mechanical Engineering Congress & Exposition IMECE 2013 November 15-21, 2013, San Diego, CA, USA

V07AT08A010-

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

Ämneskategorier

Strömningsmekanik och akustik

ISBN

978-0-7918-5631-4