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NUMERICAL SIMULATIONS OF GAP FLOW ABOVE ROTATING DISK

Abstract

A rotating disk can be considered a basic configuration for the investigations of the impact of various conditions on the flow through the clearance between the shrouded turbine blade and the casing. Numerical calculations using Fine/Turbo Numeca were conducted to examine the influence of the rotational velocity and the pressure difference across the disk on the flow conditions, especially the mass flow through the clearance. The results were validated using the experimental data. Moreover, the flow field was investigated to reveal the vortices induced in the flow. The calculations showed a significant drop of the mass flow with a rise of the rotation velocity. Additionally, the vortex created upstream of the disk at higher rotation velocities was observed. The phenomenon of separation at the edge of the disk was investigated.

Keywords:

computational fluid dynamics, internal flow, flow control

Details

Issue
Vol. 19 No. 2 (2015)
Section
Research article
Published
2015-06-30
DOI:
https://doi.org/10.17466/TQ2015/19.2/C
Licencja:
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors

  • FILIP WASILCZUK

    Polish Academy of Sciences, Institute of Fluid-Flow Machinery; Interdepartmental PhD Studies at the Gdansk University of Technology
  • PAWEŁ FLASZYŃSKI

    Polish Academy of Sciences, Institute of Fluid-Flow Machinery
  • PIOTR DOERFFER

    Polish Academy of Sciences, Institute of Fluid-Flow Machinery

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