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Flutter running waves in turbine blades cascade
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SYSNO ASEP 0483823 Document Type A - Abstract R&D Document Type O - Ostatní Title Flutter running waves in turbine blades cascade Author(s) Půst, Ladislav (UT-L) RID
Pešek, Luděk (UT-L) RID
Byrtus, M. (CZ)Source Title Dynamical Systems theory and Applications - Abstracts. - Lodž : Department of Automation, Biomechanics and Mechatronics, 2017 / Awrejcewicz J. - ISBN 978-83-935312-3-3
S. 342-342Number of pages 1 s. Publication form Print - P Action DSTA 2017 “Dynamical Systems – Theory and Applications” /14./ Event date 11.12.2017 - 12.12.2017 VEvent location Lodž Country PL - Poland Event type WRD Language eng - English Country PL - Poland Keywords turbine blades ; running waves ; flutter ; aero-elastic excitations Subject RIV BI - Acoustics OECD category Applied mechanics R&D Projects GA16-04546S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 Annotation The existence of flutter running waves has been often observed at experimental investigation of turbine blades cascade. The presented paper is an attempt to explain origin and behavior of running flutter waves in the rotating blade cascade excited by steam flow from the stationary bladed disk. One of the possibly reasons for existence of running waves are the running periodic forces from steam wakes due to different numbers of blades of stationary and rotating wheels. On a computational model of turbine disk with 10 blades there are shown properties – velocities, directions and modes – of these forced running waves. Interaction of this kind of forced excitation with aero-elastic self-excitation – flutter – causes origin of flutter running waves. These flutter waves will be analyzed in the paper for several kinds and combinations of aero-elastic self-excitations. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2018
Number of the records: 1