Influence of elastic deformation of the blade on the flow field in the blade cascade

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46709002%3A_____%2F23%3AN0000030" target="_blank" >RIV/46709002:_____/23:N0000030 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/46747885:24220/23:00011514

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11012-023-01732-8" target="_blank" >https://link.springer.com/article/10.1007/s11012-023-01732-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11012-023-01732-8" target="_blank" >10.1007/s11012-023-01732-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of elastic deformation of the blade on the flow field in the blade cascade

Popis výsledku v původním jazyce

Flutter of turbine and compressor blades represents a serious problem for designers of large turbomachines. In real machines, measurements of flutter conditions are hardly possible. Therefore, tests on linear blade cascades with movable blades play important role in investigations of flutter. In the current research, a simple blade cascade for controlled flutter testing was developed. The blades in this test rig undergo high-frequency oscillations which induce inertial forces. The influence of the elastic deformation of the blade on the flow field is studied in this work by means of experiments and numerical simulations. First, the computational and experimental modal analysis was done to obtain eigenfrequencies and modal damping. The deformed shape of the blade due to high-frequency oscillation was acquired by structural transient analysis. The influence of the elastic deformation on the flow field was then studied by CFD analysis for two incidence angles both for the deformed (elastic) and undeformed (idealized rigid) blade. Flow field was only very weakly distorted due to the blade elastic deformation. The total torque induced by aerodynamic and inertial forces was evaluated. The inertial loading is an order of magnitude larger than loading due to fluid flow.

Název v anglickém jazyce

Influence of elastic deformation of the blade on the flow field in the blade cascade

Popis výsledku anglicky

Flutter of turbine and compressor blades represents a serious problem for designers of large turbomachines. In real machines, measurements of flutter conditions are hardly possible. Therefore, tests on linear blade cascades with movable blades play important role in investigations of flutter. In the current research, a simple blade cascade for controlled flutter testing was developed. The blades in this test rig undergo high-frequency oscillations which induce inertial forces. The influence of the elastic deformation of the blade on the flow field is studied in this work by means of experiments and numerical simulations. First, the computational and experimental modal analysis was done to obtain eigenfrequencies and modal damping. The deformed shape of the blade due to high-frequency oscillation was acquired by structural transient analysis. The influence of the elastic deformation on the flow field was then studied by CFD analysis for two incidence angles both for the deformed (elastic) and undeformed (idealized rigid) blade. Flow field was only very weakly distorted due to the blade elastic deformation. The total torque induced by aerodynamic and inertial forces was evaluated. The inertial loading is an order of magnitude larger than loading due to fluid flow.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/GA20-11537S" target="_blank" >GA20-11537S: Experimentální výzkum budicí funkce flutteru v turbostrojích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Meccanica

ISSN

0025-6455

e-ISSN

—

Svazek periodika

—

Číslo periodika v rámci svazku

58

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

16

Strana od-do

2347-2362

Kód UT WoS článku

001107458300002

EID výsledku v databázi Scopus

—