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Flutter Analysis of a Transonic Steam Turbine Blade with Frequency and Time-Domain Solvers

Frey, Christian and Ashcroft, Graham and Kersken, Hans-Peter and Schlüß, Daniel (2019) Flutter Analysis of a Transonic Steam Turbine Blade with Frequency and Time-Domain Solvers. International Journal of Turbomachinery, Propulsion and Power, 4 (2). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/ijtpp4020015. ISSN 2504-186X.

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Official URL: https://www.mdpi.com/2504-186X/4/2/15


The aim of this study was to assess the capabilities of different simulation approaches to predict the flutter stability of a steam turbine rotor. The focus here was on linear and nonlinear frequency domain solvers in combination with the energy method, which is widely used for the prediction of flutter onset. Whereas a GMRES solver was used for the linear problem, the nonlinear methods employed a time-marching procedure. The solvers were applied to the flutter analysis of the first rotor bending mode of the open Durham Stea m Turbine test case. This test case is representative of the last stage of modern industrial steam turbines. We compared our results to those published by other researchers in terms of aerodynamic damping and local work per cycle coefficients. Time-domain, harmonic balance, and time-linearised methods were compared to each other in terms of CPU efficiency and accuracy.

Item URL in elib:https://elib.dlr.de/132527/
Document Type:Article
Title:Flutter Analysis of a Transonic Steam Turbine Blade with Frequency and Time-Domain Solvers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Frey, ChristianUNSPECIFIEDhttps://orcid.org/0000-0003-0496-9225UNSPECIFIED
Kersken, Hans-PeterUNSPECIFIEDhttps://orcid.org/0000-0003-4203-6450134615947
Schlüß, DanielUNSPECIFIEDhttps://orcid.org/0000-0001-7559-2264UNSPECIFIED
Journal or Publication Title:International Journal of Turbomachinery, Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:steam turbine, flutter, transonic flows, frequency-domain solvers
HGF - Research field:Aeronautics, Space and Transport
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 (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Frey, Christian
Deposited On:10 Dec 2019 13:58
Last Modified:21 Nov 2023 07:46

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