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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). ISSN 2504-186X

Full text not available from this repository.

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

Abstract

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
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Frey, ChristianChristian.Frey (at) dlr.deUNSPECIFIED
Ashcroft, GrahamGraham.Ashcroft (at) dlr.deUNSPECIFIED
Kersken, Hans-PeterHans-Peter.Kersken (at) dlr.dehttps://orcid.org/0000-0003-4203-6450
Schlüß, DanielDaniel.Schluess (at) dlr.dehttps://orcid.org/0000-0001-7559-2264
Date:2019
Journal or Publication Title:International Journal of Turbomachinery, Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
Volume:4
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2504-186X
Status:Published
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
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:10 Dec 2019 13:58

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