Supression of classical flutter ocsillations in bladed wheel using inner damping effect
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00535110" target="_blank" >RIV/61388998:_____/20:00535110 - isvavai.cz</a>
Result on the web
<a href="https://www.easdprocedia.org/conferences/easd-conferences/eurodyn-2020/9031" target="_blank" >https://www.easdprocedia.org/conferences/easd-conferences/eurodyn-2020/9031</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.47964/1120.9031.20212" target="_blank" >10.47964/1120.9031.20212</a>
Alternative languages
Result language
angličtina
Original language name
Supression of classical flutter ocsillations in bladed wheel using inner damping effect
Original language description
Inner material damping effect for reduction of self-excited vibrations due to aeroelastic instability is studied on a numerical reduced model of a rotating turbine wheel with 66 blades. The aerodynamic nozzle excitation of the rotating wheel arises from the spatially periodical flow of steam through the stator blade cascade. This excitation causes travelling deformation waves in the wheel. The analysis of forced vibration of the wheel under selfexcitation is oriented on the narrow frequency range and therefore the bladed wheel is modelled by a modal synthesis method. The self-excited aero-elastic forces are described by Van der Pol model acting herein independently to the 1th axial flexural mode of each blade of the wheel. Numerical simulations showed a very fast entry of amplitudes increase due to selfexcitation.nThe initial forced vibration mode by nozzle excitation was decisive for the vibration pattern of self-excitation. Its suppression depended on the ratio between the intensity factor of self-excitation and the size of proportional damping describing the inner damping.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
<a href="/en/project/GC19-02288J" target="_blank" >GC19-02288J: Robust reduced-order modeling of fluid-structure interaction problems</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
EURODYN 2020
ISBN
978-618-85072-0-3
ISSN
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e-ISSN
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Number of pages
10
Pages from-to
402-411
Publisher name
National Technical University of Athens (NTUA)
Place of publication
Athens
Event location
Athény
Event date
Nov 23, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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