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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/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech, Paper) | |||||||||
| Title: | Generalised implementation of Low-Mach preconditioning for arbitrary three-dimensional geometries | |||||||||
| Authors: |
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| 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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