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Artikel

Influence of Sub-Grid Scale Models for Large Eddy Simulations on the Acoustic Noise Production in Jets

Författare: Semlitsch, B., Mihaescu, M, Fuchs, L.F., Gutmark, E.
Dokumenttyp: Konferens
Tillstånd: Publicerad
Tidskrift: Proc. of 14th European Turbulence Conference (ETC 14), Lyon, France
Volym:   
År: 2013

Abstract

A high subsonic jet is simulated by solving the compressible Navier-Stokes equations using Large Eddy Simulation. The sub-grid scales (SGS) are handled by using three different approaches, e.g. the Smagorinsky-Lilly model, a dynamic SGS model and an implicit approach. Lighthill’s acoustic analogy indicates that the Reynolds-stress term is a significant term to predict accurately acoustic noise. The obtained turbulent production and dissipation terms are analyzed and compared for all three SGS methods. The obtained statistics are linked with the turbulent acoustic noise production.