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Numerical Investigation of Active Flow Control Around a Generic Truck A-Pillar

Guglielmo Minelli (Institutionen för tillämpad mekanik, Strömningslära) ; Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; Branislav Basara (Institutionen för tillämpad mekanik, Strömningslära) ; Bernd Noack
Flow Turbulence and Combustion (1386-6184). Vol. 97 (2016), 287, p. 1-20.
[Artikel, refereegranskad vetenskaplig]

Large Eddy Simulations (LES) are conducted to study the actuated flow field around a bluff body. The model is a simplified section of a truck. The aim of the work is to model the separation of the flow acting at the front rounded corners, the so called A-pillars, and to minimize the separation of the flow by means of Zero Net Mass Flux synthetic jets. LES data show the interaction of the flow main structures, the separation mechanism and the effects of the actuation on the flow field. The flow is post processed using modal and frequency decompositions. Relevant results in terms of drag reduction were observed for the actuated flow. The principle flow mechanisms are discussed and an optimal actuation frequency, in terms of induced fluctuations and drag reduction, is identified.

Nyckelord: Active flow control · AFC · Zero net mass flux · Synthetic jet · LES · POD · Truck · A-pillar



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Denna post skapades 2016-09-02.
CPL Pubid: 241172

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Transport
Farkostteknik
Strömningsmekanik

Chalmers infrastruktur