Kersken, Hans-Peter and Ashcroft, Graham and Frey, Christian and Wolfrum, Nina and Pütz, Oliver (2018) Comparison of Linear and Nonlinear Frequency Domain Methods for Flutter Analysis. In: Proceedings of the ASME Turbo Expo. ASME Turbo Expo 2018, 11-16 Jun 2018, Oslo, Norway.
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Abstract
Both linear and nonlinear frequency domain methods have been applied successfully to the investigation of time-periodic phenomena in turbomachinery. Linear methods allow to perform flutter analysis of turbomachinery blade rows very efficiently. Nonlinear frequency domain method can be applied to flutter analysis as well. If a pseudo-time solution algorithm is employed as a solver the nonlinear frequency domain method takes advan- tage of the stabilizing effect of the nonlinear coupling of the har- monics. Additionally, it allows studying the influence of nonlin- ear effects on the flutter stability. A linear GMRes based method and a harmonic balance method using a pseudo-time solution approach are compared with respect to computational efficiency when applied to the flutter analysis of blades of a stationary gas turbine and a low pressure turbine of a jet engine. It is shown that both methods have their merits and limitation depending on the type of problem at hand.
Item URL in elib: | https://elib.dlr.de/120509/ | ||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||
Title: | Comparison of Linear and Nonlinear Frequency Domain Methods for Flutter Analysis | ||||||||||||||||||
Authors: |
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Date: | 11 June 2018 | ||||||||||||||||||
Journal or Publication Title: | Proceedings of the ASME Turbo Expo | ||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||
Open Access: | No | ||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||
Status: | Published | ||||||||||||||||||
Keywords: | Flutter, Hamronic Balance, nonlinear frequency domain method, time-linearized | ||||||||||||||||||
Event Title: | ASME Turbo Expo 2018 | ||||||||||||||||||
Event Location: | Oslo, Norway | ||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||
Event Dates: | 11-16 Jun 2018 | ||||||||||||||||||
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 - Turbine Technologies (old) | ||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||
Institutes and Institutions: | Institute of Propulsion Technology > Numerical Methodes | ||||||||||||||||||
Deposited By: | Kersken, Dr.rer.nat. Hans-Peter | ||||||||||||||||||
Deposited On: | 21 Jun 2018 09:49 | ||||||||||||||||||
Last Modified: | 27 Jun 2018 11:23 |
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