Modelling of unsteady secondary vortices generated behind the radial gap of the axial turbine blade wheel

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F16%3AN0000095" target="_blank" >RIV/00010669:_____/16:N0000095 - isvavai.cz</a>
Result on the web
<a href="https://eccomas2016.org/proceedings/pdf/9777.pdf" target="_blank" >https://eccomas2016.org/proceedings/pdf/9777.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Modelling of unsteady secondary vortices generated behind the radial gap of the axial turbine blade wheel
Original language description
The paper deals with application of the linear eddy viscosity model, the nonlinear explicit algebraic Reynolds stress model and the hybrid RANS/LES model for computation of flow in an axial turbine stage with radial gaps under the stator and above the rotor blade. Results show that the nonlinear explicit algebraic Reynolds stress model allows to describe deformation of the secondary vortices and their breakdown into smaller structures while the linear eddy viscosity model doesn't have this capability. Only hybrid RANS/LES model describes decay of the secondary vortices which interact with the rotor blade. This capability is necessary for good prediction of distribution of the turbine stage efficiency behind the rotor blade.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
ECCOMAS Congress 2016 - Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering
ISBN
978-618-82844-0-1
ISSN
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e-ISSN
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Number of pages
12
Pages from-to
7532-7543
Publisher name
National Technical University of Athens
Place of publication
Greece
Event location
Crete Island
Event date
Jun 5, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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