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LES of the flow around Ahmed body with active flow control

Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; Branislav Basara (Institutionen för tillämpad mekanik, Strömningslära)
2nd International Conference on Turbulence and Interaction, Martinique, France, May 31-June 05, 2009 (1612-2909 ). Vol. 110 (2010), p. 247-254.
[Konferensbidrag, refereegranskat]

Three different activation strategies for active flow control around an Ahmed body are investigated using large eddy simulations. Both the separation region on the slanted surface and the cone-like trailing vortices were influenced using different actuation strategies. However, only one of the flow regions was influenced at a time. The actuation of the separation slant region was done using either constant blowing or periodic blowing and suction through the spanwise slot near the edge between the slant and the top of the body. Another actuation strategy used blowing of constant jets into the cone-like vortices with the objective to weaken them. The latter strategy was found to produce an increased drag in agreement with previous experimental data. Only the actuation strategy using constant blowing along the spanwise slot was found to decrease the overall drag on the body.

Nyckelord: active flow control, ground vehicle, Ahmed body, LES

Denna post skapades 2010-01-18. Senast ändrad 2014-09-29.
CPL Pubid: 108632


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära



Chalmers infrastruktur