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Generalised implementation of Low-Mach preconditioning for arbitrary three-dimensional geometries

Fiedler, Jens and di Mare, Francesca (2012) Generalised implementation of Low-Mach preconditioning for arbitrary three-dimensional geometries. ECCOMAS 2012, 10.-14. Sep. 2012, Wien, Österreich.

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Abstract

Turbomachinery flows involves a wide range of compressible and incompressible flow regimes. In the design process the application of various solvers for different flow speeds is cost- and time-intensive and mostly unattractive. Therefore, low Mach preconditioning methods have become a powerful tool to improve the accuracy of the solution of the Navier-Stokes equations obtained by compressible solvers at low speeds, whilst accelerating convergence. Particulary in three-dimensional problems, such as in turbomachinery design practice preconditioning is an extremely difficult task, which has not been extensively treated in the literature. In this work an enhanced preconditioning method is presented in its full three-dimensional formulation and its implementation in the DLR-code TRACE discussed. Computations of classic academic testcases (e.g. GAMM bump series, flow in a cavity) are presented. The flow in a labyrinth seal of a LP gas turbine has also been investigated with excellent results, which will be also briefly illustrated.

Item URL in elib:https://elib.dlr.de/76321/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Generalised implementation of Low-Mach preconditioning for arbitrary three-dimensional geometries
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fiedler, Jensjens.fiedler (at) dlr.deUNSPECIFIED
di Mare, Francescafrancesca.dimare (at) dlr.deUNSPECIFIED
Date:2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:numerical methods, compressible flows, acceleration methods
Event Title:ECCOMAS 2012
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:10.-14. Sep. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Fiedler, Jens
Deposited On:05 Feb 2013 09:12
Last Modified:05 Feb 2013 09:12

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