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Experimental and Numerical Studies on Highly Loaded Supersonic Axial Turbine Cascades

Wolf, Torsten and Kost, Friedrich and Janke, Erik and Haselbach, Frank and Willer, Lars (2010) Experimental and Numerical Studies on Highly Loaded Supersonic Axial Turbine Cascades. ASME Turbo Expo 2010, 14.-18. Juni 2010, Glasgow, UK.

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Abstract

For the small to medium thrust range of modern aero engines, highly loaded single stage HP turbines facilitate an attractive alternative to a more conventional 2-stage HPT architecture. Whereas the potential benefits of reductions in component length and part count, hence, in weight and cost do motivate their application, the related risks are in maintaining associated losses of supersonic flows at low values as well as managing the interaction losses between HPT and the downstream sub-component to arrive at competitive levels of component efficiencies. This paper focuses on fundamental aerodynamic concept studies and related cascade experiments in support of a future highly loaded high-pressure turbine architecture. Starting with some general remarks on low-loss supersonic aerodynamic concepts for high-pressure turbines, results from development efforts towards 2D airfoil concepts viable for high-pressure turbine airfoils are shown. In particular, CFD based design approaches are compared against experimental data taken at DLR Göttingen in un-cooled cascade tests and at engine representative levels of Mach and Reynolds numbers. For the airfoils investigated, it turns out that there is indeed a supersonic Mach number range were loss levels are comparable to high Mach number subsonic values, thereby enabling a competitive aerodynamic design concept for a 3D high-pressure turbine stage

Item URL in elib:https://elib.dlr.de/76693/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Experimental and Numerical Studies on Highly Loaded Supersonic Axial Turbine Cascades
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wolf, TorstenRolls-Royce DeutschlandUNSPECIFIED
Kost, FriedrichDLR, GöttingenUNSPECIFIED
Janke, ErikRolls-Royce DeutschlandUNSPECIFIED
Haselbach, FrankRolls-Royce plc., UKUNSPECIFIED
Willer, LarsRolls-Royce DeutschlandUNSPECIFIED
Date:14 June 2010
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:Proceedings of ASME Turbo Expo 2010
Status:Published
Keywords:Higly Loaded Supersonic Axial Turbine Cascade
Event Title:ASME Turbo Expo 2010
Event Location:Glasgow, UK
Event Type:international Conference
Event Dates:14.-18. Juni 2010
Organizer:ASME
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Kost, Dr.rer.nat. Friedrich
Deposited On:09 Aug 2012 11:03
Last Modified:09 Aug 2012 11:03

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