Experimental and Numerical Study of Controlled Flutter Testing in a Linear Turbine Blade Cascade

TitleExperimental and Numerical Study of Controlled Flutter Testing in a Linear Turbine Blade Cascade
Publication TypeJournal Article
Year of Publication2018
AuthorsSláma V, Rudas B, Eret P, Tsymbalyuk V, Ira J, Macalka A, Pinelli L, Vanti F, Arnone A, Lo Balbo A A
JournalActa Polytechnica CTU Proceedings
VolumeVol 20 Turbomachines 2018
Pagination98-107
ISBN Number978-80-01-06521-1
ISSN Number2336-5382
Keywordsblade cascade, CFD, experiment, Flutter, last stage blades, measurement, numerical analysis, Steam Turbine, test rig, validation
Abstract

In this paper, experimental testing of flutter and numerical simulations using a commercial code ANSYS CFX and an in-house code TRAF are performed on an oscillating linear cascade of turbine blades installed in a subsonic test rig. Bending and torsional motions of the blades are investigated in a travelling wave mode approach. In each numerical approach, a rig geometry model with a different level of complexity is used. Good agreement between the numerical simulations and experiments is achieved using both approaches and benefits and drawbacks of each technique are commented in this paper. It is demonstrated that both used computational techniques are adequate to predict turbine blade flutter. It is concluded that validated numerical tools can provide a better insight of flutter phenomena of operationally flexible steam turbine last stage blades.

URLhttps://ojs.cvut.cz/ojs/index.php/APP/article/view/5372
DOI10.14311/APP.2018.20.0098
Refereed DesignationRefereed