Aero-elastic vibration of bladed turbine wheel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F17%3A00482043" target="_blank" >RIV/61388998:_____/17:00482043 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Aero-elastic vibration of bladed turbine wheel

Popis výsledku v původním jazyce

The contribution brings a simple analysis of influence of numbers of blades in stationary and rotating turbine wheels on the origin and on properties of forced and aero-elastic running waves in blade cascade. The studied system is simplified on the rotating wheel with 12 blades, each modelled by 1 DOF. The stationary wheel has 11 blades. nThe wakes of steam-flow from stationary cascade excites rotating blades by periodic forces, mutual shifted by phase delays depending on the ration of rotor and stator blades. Different numbers of blades on rotating and on stationary wheels produce forced running waves in the rotating blade cascade. The flowing gas causes also instability and increase of self-excited oscillations, described by Van der Pol model. These flutter oscillations are synchronized by forced running waves and result into dangerous flutter running waves. nDetailed properties of these flutter running waves were analysed in the paper.n

Název v anglickém jazyce

Aero-elastic vibration of bladed turbine wheel

Popis výsledku anglicky

The contribution brings a simple analysis of influence of numbers of blades in stationary and rotating turbine wheels on the origin and on properties of forced and aero-elastic running waves in blade cascade. The studied system is simplified on the rotating wheel with 12 blades, each modelled by 1 DOF. The stationary wheel has 11 blades. nThe wakes of steam-flow from stationary cascade excites rotating blades by periodic forces, mutual shifted by phase delays depending on the ration of rotor and stator blades. Different numbers of blades on rotating and on stationary wheels produce forced running waves in the rotating blade cascade. The flowing gas causes also instability and increase of self-excited oscillations, described by Van der Pol model. These flutter oscillations are synchronized by forced running waves and result into dangerous flutter running waves. nDetailed properties of these flutter running waves were analysed in the paper.n

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA16-04546S" target="_blank" >GA16-04546S: Aeroelastické vazby a dynamické chování rotačně periodických těles</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů