Robust and Model Predictive Drag Control for a Generic Car Model

Robust control of drag and lateral dynamic response for road vehicles exposed to cross-wind gusts

“…Although active flow control (AFC) methods for bluff bodies are gaining more and more attention, they are still mostly investigated under steady, lowturbulent flow conditions with the objective of minimizing aerodynamic drag. Here, most researchers investigate the Ahmed body with actuation on the rear slant (Brunn et al 2007;Muminović et al 2008;Aubrun et al 2011;Joseph et al 2012;Park et al 2013;Gilliéron and Kourta 2013), whereas there are only a few reports about the successful application of AFC to square-back configurations. To this end, Littlewood and Passmore (2012) use steady blowing through a single slot at the upper rear edge of a simplified car model for aerodynamic drag reduction, whereas Englar (2001Englar ( , 2004 applies pneumatic actuation, exploiting the Coanda effect along all four rear edges of a generic trucktrailer configuration.…”

Control of Wall Pressure Flow Field with Micro Jets and Control Effectiveness

“…It is also found that many techniques can be used to reduce or even suppress the flow separation. These techniques include puffing or imbibition of air flow through channels [17,18] or holes [19], sequential arrangement of pulsed jets, actuators [20]and others. All of these techniques come with pros and cons, as the steady puffing or suction through orifices normal to free stream flow and located close down stream of the separation line has been revealed to be effective in reattaching the flow, but such devices need a continuous supply of mass flow which is difficult to attain.…”