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Large Eddy Simulation of flows in industrial compressors: a path from 2015 to 2035

Gourdain, Nicolas and Sicot, Frédéric and Duchaine, Florent and Gicquel, Laurent Y.M. Large Eddy Simulation of flows in industrial compressors: a path from 2015 to 2035. (2014) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 372 (2022). 1-18. ISSN 0080-4614

(Document in English)

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Official URL: http://rsta.royalsocietypublishing.org/content/372/2022/20130323


A better understanding of turbulent unsteady flows is a necessary step towards a breakthrough in the design of modern compressors. Due to high Reynolds numbers and very complex geometry, the flow that develops in such industrial machines is extremely hard to predict. At this time, the most popular method to simulate these flows is still based on a Reynolds Averaged Navier-Stokes (RANS) approach. However there is some evidence that this formalism is not accurate for these components, especially when a description of time-dependent turbulent flows is desired. With the increase in computing power, Large Eddy Simulation (LES) emerges as a promising technique to improve both knowledge of complex physics and reliability of flow solver predictions. The objective of the paper is thus to give an overview of the current status of LES for industrial compressor flows as well as to propose future research axes regarding the use of LES for compressor design. While the use of wall-resolved LES for industrial multistage compressors at realistic Reynolds number should not be ready before 2035, some possibilities exist to reduce the cost of LES, such as wall-modelling and the adaptation of the phase lag condition. This paper also points out the necessity to combine LES to techniques able to tackle complex geometries. Indeed LES alone, i.e. without prior knowledge of such flows for grid construction or the prohibitive yet ideal use of fully homogeneous meshes to predict compressor flows, is quite limited today.

Item Type:Article
Additional Information:Thanks to The Royal Society Publishing. The original PDF of the article can be found at Key Engineering Materials: http://rsta.royalsocietypublishing.org/
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited On:20 Jan 2015 16:53

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