Engineering Mechanics

Proceedings Vol. 26 (2020)

ENGINEERING MECHANICS 2020

26th INTERNATIONAL CONFERENCE
November 24 – 25, 2020, Brno, Czech Republic

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Editors: Vladimír Fuis

ISBN 978-80-214-5896-3 (printed)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

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PREDICTION OF THE OVERLOADED AXIAL TURBINE STAGE EFFICIENCY USING THE HYBRID RANS/LES TURBULENCE MODEL

Straka P., Pelant J.
pages 464 - 467, full text

The paper deals with application of hybrid RANS/LES turbulence model for computation of flow in axial turbine stage at off-design operation regime. This operating regime is characterized by massive separation of the boundary layer on the suction side of the rotor blades which leads to high-swirl flow field behind the axial stage. Used hybrid RANS/LES model is based on transport equation for the kinetic energy which is shared in both RANS and LES modes. The model is implemented into the in-house numerical code which was originally designed for solution of RANS equation. Therefore the numerical inviscid fluxes are modified here in order to reduce a native numerical dissipation for use in LES approach

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All papers were reviewed by members of the scientific committee.

Engineering Mechanics

International Conference

Proceedings Vol. 26 (2020)

ENGINEERING MECHANICS 2020