Exit Flow Field Patterns beyond the Limit Load Condition in a Hub Turbine Profile Cascade

0507249 - ÚT 2020 PL eng A - Abstract
Luxa, Martin - Fürst, J. - Šimurda, David
Exit Flow Field Patterns beyond the Limit Load Condition in a Hub Turbine Profile Cascade.
Book of Abstract ISAIF 14th. Gdaňsk, 2019. s. 9-10.
[International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows /14./. 08.07.2019-11.07.2019, Gdańsk]
R&D Projects: GA TA ČR TH02020057
Institutional support: RVO:61388998
Keywords : limit load condition * hub section * turbine rotor blade * CFD
OECD category: Applied mechanics

The paper is focused on supersonic exit flow field downstream of a prismatic blade cascade representing hub section applied at the last stage rotor of a large output steam turbine. Attention is paid to the regimes with the limit load, i.e. regimes when in the exit plane of the cascade the axial component of velocity reaches the sonic value. In such case, further expansion takes place only downstream the cascade having no effect on the cascade loading. The theoretical and numerical approaches are supported by experimental data.
Permanent Link: http://hdl.handle.net/11104/0299179