Modelling of flutter running waves in turbine blades cascade

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F18%3A43952301" target="_blank" >RIV/49777513:23520/18:43952301 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388998:_____/18:00495727

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jsv.2018.08.011" target="_blank" >http://dx.doi.org/10.1016/j.jsv.2018.08.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jsv.2018.08.011" target="_blank" >10.1016/j.jsv.2018.08.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of flutter running waves in turbine blades cascade

Popis výsledku v původním jazyce

Flutter running waves in turbine blade cascade were often observed at experimental investigation of blades vibrations, but theirs detailed analysis has not yet been sufficiently realized. This contribution tries 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 possible 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. Properties – velocities, directions and modes – of these forced running waves are shown using computational model of turbine disk with 10 blades. Interaction of this kind of forced excitation with aero-elastic self-excitation – flutter – causes origin of the flutter running waves. These flutter waves, modelled by the Van der Pol formula, are analysed in the paper for this simplified form of aero-elastic self-excitations.

Název v anglickém jazyce

Modelling of flutter running waves in turbine blades cascade

Popis výsledku anglicky

Flutter running waves in turbine blade cascade were often observed at experimental investigation of blades vibrations, but theirs detailed analysis has not yet been sufficiently realized. This contribution tries 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 possible 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. Properties – velocities, directions and modes – of these forced running waves are shown using computational model of turbine disk with 10 blades. Interaction of this kind of forced excitation with aero-elastic self-excitation – flutter – causes origin of the flutter running waves. These flutter waves, modelled by the Van der Pol formula, are analysed in the paper for this simplified form of aero-elastic self-excitations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

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

2018

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF SOUND AND VIBRATION

ISSN

0022-460X

e-ISSN

—

Svazek periodika

436

Číslo periodika v rámci svazku

December 2018

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

286-294

Kód UT WoS článku

000446882400018

EID výsledku v databázi Scopus

2-s2.0-85052154824