Numerical Simulation of Subsonic and Supersonic Impinging Jets

Robert Wilke () and Jörn Sesterhenn ()
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Robert Wilke: Fachgebiet Numerische Fluiddynamik, Technische Universität Berlin
Jörn Sesterhenn: Fachgebiet Numerische Fluiddynamik, Technische Universität Berlin

A chapter in High Performance Computing in Science and Engineering ’15, 2016, pp 349-369 from Springer

Abstract: Abstract This report concentrates on fully turbulent confined round impinging jets with focus on heat transfer and the source mechanism of the impinging tones. Direct numerical simulations were performed with Reynolds numbers of Re = 3300 (subsonic and supersonic) and Re = 8000 (subsonic) using grid sizes of 512 × 512 × 512 respectively 1024 × 1024 × 1024 points. The transient flow field is analysed using a dynamic mode decomposition (DMD). It is shown that there is a dominant frequency with which the heat transfer at the impinging plate fluctuates. The corresponding structures are the vortex rings developing in the shear layer of the free jet region of the impinging jet. The same structures are together with the standoff shock responsible for the discrete tones referred to as impinging tones emitted by supersonic impinging jets.

Keywords: Nusselt Number; Shear Layer; Large Eddy Simulation; Primary Vortex; Dynamic Mode Decomposition (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-319-24633-8_23

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DOI: 10.1007/978-3-319-24633-8_23

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