Turbulence Treatment in Steady and Unsteady Turbomachinery Flows
Franke, Martin and Röber, Thomas and Kügeler, Edmund and Ashcroft, Graham (2010) Turbulence Treatment in Steady and Unsteady Turbomachinery Flows. V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010, 14.-17. Juni 2010, Lissabon, Portugal. ISBN 978-989-96778-1-4.
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The adequate representation of turbulence is crucial for the predictive accuracy of the computational method used in the turbomachinery design process. While unsteady simulations are of ever-increasing importance, steady Reynolds-Averaged Navier-Stokes computations will remain the workhorse of industrial CFD for some time. Turbulence treatments for both cases are presented. Since standard linear eddy-viscosity models exhibit some well-known deficiencies, a twofold strategy is pursued in the DLR-code TRACE: While the inclusion of turbomachineryspecific extensions to two-equation eddy-viscosity models forms the backbone of the turbulence modelling effort, Explicit Algebraic Reynolds Stress Models are currently validated for turbomachinery flows. With the continued increase in available computer power, unsteady computations are no longer beyond the realm of industrial CFD. In particular for flow features such as largescale separation and wakes, hybrid methods become increasingly popular. Here, Detached-Eddy Simulation is used, where a RANS treatment is retained for attached boundary layers while the separated areas of the flow are treated in an LES-type fashion. The results demonstrate the improved predictive accuracy as well as the feasibility of the presented approaches.
|Document Type:||Conference or Workshop Item (Speech, Paper)|
|Title:||Turbulence Treatment in Steady and Unsteady Turbomachinery Flows|
|In ISI Web of Science:||No|
|Keywords:||Turbomaschinen, Aerodynamik, CFD, Turbulenzmodellierung|
|Event Title:||V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010|
|Event Location:||Lissabon, Portugal|
|Event Type:||international Conference|
|Event Dates:||14.-17. Juni 2010|
|Organizer:||European Community on Computational Methods in Applied Sciences (ECCOMAS)|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L ER - Engine Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Virtual Engine and Validation Methods|
|Institutes and Institutions:||Institute of Propulsion Technology > Numerical Methodes|
|Deposited By:||Dr. Martin Franke|
|Deposited On:||15 Feb 2011 13:38|
|Last Modified:||15 Feb 2011 13:38|
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