Understanding the Dynamics and Control of a Turbulent Impinging Jet via Pulsation and Swirl Using Large Eddy Simulation

Naseem Uddin, Sven Olaf Neumann () and Bernhard Weigand
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Naseem Uddin: Universität Stuttgart, Institut für Thermodynamik der Luft- und Raumfahrt

A chapter in High Performance Computing in Science and Engineering '09, 2010, pp 325-341 from Springer

Abstract: Abstract Impinging jets are used in a variety of engineering applications like in chemical reactors, mixing devices, drying and cooling applications. Good quality simulations of this highly complex flow field is a challenging task. In this work, the flow field and heat transfer of turbulent pulsating and swirling jet impingements are investigated by Large Eddy Simulation (LES). The benchmark case of turbulent impinging jet with out swirl and excitation, recommended by ERCOFTAC, is simulated first. In all investigations the jet’s Reynolds number (Re) is 23000 and jet outlet-to-target wall distance (H/D) is 2. The agreement between experimental data and simulation gives encouragement for further investigation of complex flow of jets impingement with excited inlet velocity profiles and swirl. The pulsating jets are investigated at four different excitations modes. Where as the swirl is introduced at two different swirl numbers (S). The correlation between the heat transfer mechanism, flow kinematics and turbulence quantities is investigated.

Keywords: Heat Transfer; Nusselt Number; Turbulent Kinetic Energy; Large Eddy Simulation; Reynolds Average Navier Stokes (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-04665-0_24

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DOI: 10.1007/978-3-642-04665-0_24

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