Title: Numerical simulations of aeroelastic instabilities in a turbine-blade cascade by a modified Van der Pol model at running excitation
Authors: Pešek, Luděk
Šnábl, Pavel
Prasad, Chandra Shekhar
Delanney, Y.
Citation: Applied and Computational Mechanics. 2023, vol. 17, no. 1, p. 35-52.
Issue Date: 2023
Publisher: University of West Bohemia
Document type: article
URI: http://hdl.handle.net/11025/54293
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: třepetání;lopatková kaskáda;sebebuzení;Van der Pol
Keywords in different language: flutter;blade cascade;self-excitation;Van der Pol
Abstract in different language: The onset and spread of flutter in a turbine blade cascade are numerically studied. Due to the application of thereduced-cascade model consisting of simple elements (springs, rigid bodies, linear dampers) and aeroelastic forcesintroduced by the analytical Van der Pol model, it is useful to study the dangerous states of vibration of suchcomplicated turbine parts. This study examines aeroelastic instabilities of a 10-blade cascade at running excitationthat arise due to wakes flowing from the stator blades to the rotating blades. Unlike our previous work, it bringsa new definition of the Van der Pol model of self-excitation that is controlled by relative inter-blade motion ofneighbouring blades.
Rights: © University of West Bohemia
Appears in Collections:Volume 17, number 1 (2023)
Volume 17, number 1 (2023)

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