Proceedings Vol. 21 (2015)
ENGINEERING MECHANICS 2015
May 11 – 14, 2015, Svratka, Czech Republic
Copyright © 2015 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)
list of papers scientific commitee
pages 294 - 295, full text
The contribution deals with experimental and numerical investigation of flow-field in an axial turbine stage with prismatic blades which are not equipped with a shroud. Main attention is paid to the influence of the radial clearance under the stator blade on generating of the secondary flow structure which dramatically affect flow-field in the hub part of the rotor blade. Results of the numerical simulation are compared with the experimental data. Both numerical and experimental data point to a significant drop in efficiency of the stage due to interaction of the rotor blades with the secondary vortices generated behind the radial clearance under the stator blade.
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