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Predicting Transition on Low-Pressure Turbine Profiles

Marciniak, Vincent and Kügeler, Edmund and Franke, Matthias (2010) Predicting Transition on Low-Pressure Turbine Profiles. In: Proceedings Fifth European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010. V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010, 14.-17. Juni 2010, Lisabon, Portugal. ISBN 978-989-96778-1-4.

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Abstract

Abstract. In turbomachines, transitional flows are likely to occur over many components. In the case of a low-pressure turbine, the transition from laminar to turbulent boundary layer is often separation-induced. The overall blade losses depend among others physical effects on the size and the length of the separation bubble. The characteristics of the separation bubble are strongly linked with the Reynolds number and the turbulence intensity of the flow. So, turbomachinery designers require tools which could be used to achieve an accurate prediction of the laminar-turbulent transition. Many computational techniques are available to predict transitional behavior. However, only the computation of the Reynolds Averaged Navier-Stokes (RANS) equations seems to be able to be used in an industrial context, due to the relatively low computational ressource required. The aim of this paper is to present and compare different approaches used to predict transition on practical test cases. Two models using experimental correlations to simulate transitional flows are described. The first uses boundary layer integral values, and the second uses only local values. The chosen test cases are two low-pressure turbine cascades with different aerodynamic loads and a multistage low-pressure turbine.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Predicting Transition on Low-Pressure Turbine Profiles
Authors:
AuthorsInstitution or Email of Authors
Marciniak, Vincentvincent.marciniak@dlr.de
Kügeler, Edmundedmund.kuegeler@dlr.de
Franke, Matthiasmatthias.franke@muc.mtu.de
Date:June 2010
Journal or Publication Title:Proceedings Fifth European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
Pereira, J. C. F.UNSPECIFIED
Sequeira, A.UNSPECIFIED
Pereira, J. M. C.UNSPECIFIED
ISBN:978-989-96778-1-4
Status:Published
Keywords:Computational Fluid Dynamics, Turbomaschinen, Transitionsmodell
Event Title:V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010
Event Location:Lisabon, Portugal
Event Type:international Conference
Event Dates:14.-17. Juni 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation Methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Kathrin Heitkamp
Deposited On:15 Feb 2011 13:45
Last Modified:15 Feb 2011 13:45

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