The Validation of Flutter Prediction in a Linear Cascade of Non-Rigid Turbine Blades
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23210%2F18%3A43954513" target="_blank" >RIV/49777513:23210/18:43954513 - isvavai.cz</a>
Výsledek na webu
<a href="http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2701433" target="_blank" >http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2701433</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1115/GT2018-75502" target="_blank" >10.1115/GT2018-75502</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
The Validation of Flutter Prediction in a Linear Cascade of Non-Rigid Turbine Blades
Popis výsledku v původním jazyce
In low-pressure steam turbines, aerodynamic and structural design of the last stage blades is critical in determining the power plant efficiency. The development of longer last stage blades which are recently over 1 meter in length is an important task for steam turbine manufactures. The design process involves a flutter analysis of last stage blade tip sections where increased unsteady aerodynamic forces and moments might endanger the blade aerodynamic stability. However, numerical design tools must be validated using measurements in test facilities under various operating conditions. In this work, ANSYS CFX is used for flutter prediction of turbine blade tip sections oscillating in a travelling wave mode. Simulations are compared to experimental results obtained from controlled flutter tests in a wind tunnel with a linear cascade of eight turbine blade profiles made of carbon fibre. Central four blades are flexibly mounted each with two degrees of freedom (i.e. bending and torsion motions). Large deflections of thin blade profiles are accounted for the estimation of unsteady aerodynamic forces and moments. A satisfactory agreement between the simulations and experiments is achieved.
Název v anglickém jazyce
The Validation of Flutter Prediction in a Linear Cascade of Non-Rigid Turbine Blades
Popis výsledku anglicky
In low-pressure steam turbines, aerodynamic and structural design of the last stage blades is critical in determining the power plant efficiency. The development of longer last stage blades which are recently over 1 meter in length is an important task for steam turbine manufactures. The design process involves a flutter analysis of last stage blade tip sections where increased unsteady aerodynamic forces and moments might endanger the blade aerodynamic stability. However, numerical design tools must be validated using measurements in test facilities under various operating conditions. In this work, ANSYS CFX is used for flutter prediction of turbine blade tip sections oscillating in a travelling wave mode. Simulations are compared to experimental results obtained from controlled flutter tests in a wind tunnel with a linear cascade of eight turbine blade profiles made of carbon fibre. Central four blades are flexibly mounted each with two degrees of freedom (i.e. bending and torsion motions). Large deflections of thin blade profiles are accounted for the estimation of unsteady aerodynamic forces and moments. A satisfactory agreement between the simulations and experiments is achieved.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
20301 - Mechanical engineering
Návaznosti výsledku
Projekt
—
Návaznosti
R - Projekt Ramcoveho programu EK
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Proceedings of ASME Turbo Expo 2018
ISBN
978-0-7918-5115-9
ISSN
neuvedeno
e-ISSN
neuvedeno
Počet stran výsledku
10
Strana od-do
"V07CT36A010", 1-10
Název nakladatele
ASME
Místo vydání
US
Místo konání akce
Oslo, Norway
Datum konání akce
11. 6. 2018
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000457071100051