Numerical and Experimental Investigation of the Flow Field in Five Blade Linear Cascade in Subsonic Flow

0584550 - ÚT 2024 CZ eng C - Conference Paper (international conference)
Šnábl, Pavel - Chindada, Sony - Bublík, O. - Procházka, Pavel P. - Prasad, Chandra Shekhar
Numerical and Experimental Investigation of the Flow Field in Five Blade Linear Cascade in Subsonic Flow.
Computational mechanics 2021. Proceedings of computational mechanics 2021. Plzeň: University of West Bohemia, 2021 - (Adámek, V.; Jonášová, A.; Plánička, S.; Zajíček, M.), s. 232-233. ISBN 978-80-261-1059-0.
[Computational Mechanics 2021 /36./. Srní (CZ), 08.11.2021-10.11.2021]
R&D Projects: GA ČR(CZ) GA20-26779S
Institutional support: RVO:61388998
Keywords : subsonic flow * flow field * blade linear cascade * ansys fluent * FlowPro
OECD category: Applied mechanics
https://dspace5.zcu.cz/handle/11025/46212

In large steam turbines, last stage blades are very long and must be designed very thin and with no shroud to minimize the centrifugal force which leads to low eigenfrequencies and low structural damping. In this case, aero-elastic damping plays important role on last stage bladed disc’s dynamics. Three major aero-elastic issues found in turbomachinery are forced response, non-synchronous vibrations, and flutter. Flutter is an unstable, self-excited vibration resulting from coupling between the structural vibrations and unsteady aerodynamic forces. It is clear that this unstable behaviour must be avoided and predictions of flutter behaviour need to be performed during design stage of the turbine.

Permanent Link: https://hdl.handle.net/11104/0352510