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EXPERIMENTAL AND NUMERICAL INVESTIGATION OF ACTIVE FLOW CONTROL ON A GENERIC TRUCK CABIN

Guglielmo Minelli (Institutionen för tillämpad mekanik, Strömningslära) ; Erwin Hartono (Institutionen för tillämpad mekanik, Strömningslära) ; Linus Hjelm ; Valery Chernoray (Institutionen för tillämpad mekanik, Strömningslära) ; Branislav Basara (Institutionen för tillämpad mekanik, Strömningslära) ; Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära)
11TH INTERNATIONAL ERCOFTAC SYMPOSIUM ON ENGINEERING TURBULENCE MODELLING AND MEASUREMENT (2016)
[Konferensbidrag, refereegranskat]

This work presents the achievement in drag reduction by use of Active Flow Control (AFC) on a generic bluff body. The model consists of a simplified truck cabin, characterized by sharp edge separation on top and bottom edges and pressure induced separation on the rounded vertical front corner. The pressure induced separation reproduces the flow separation occurring at the front A-pillar of a real truck. Hybrid Partially Averaged Navier-Stokes (PANS) simulations are compared with wind tunnel experiments. The Reynolds number for both simulations and experiments is Re = 5×10^5 based on the inlet velocity Uinf and the width of the model W = 0.4 m. A validation of the hybrid CFD model on two flow configurations is followed by a CFD study on the optimal actuation frequency able to minimize the aerodynamic drag. PANS accurately predicts the flow field measured in experiments and a notable drag reduction by means of AFC is observed in a numerical study.



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Denna post skapades 2016-10-18.
CPL Pubid: 243626

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Transport
Farkostteknik
Strömningsmekanik

Chalmers infrastruktur