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A Numerical Study Of The 3d Swirling Flow Upstream The Kaplan Turbine Runner At Off-Design Operating Conditions
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Scientific Bulletin of the “Politehnica” University of Timisoara, Transactions on Mechanics, ISSN 1224-6077, Tom 50(64), pp. 97-104
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ABSTRACT
The present paper addresses the hydrodynamic field
in the spiral case and the distributor (stay vanes and
guide vanes) upstream the Kaplan turbine runner. The
spiral case and distributor generate a suitable swirling
flow further ingested by the Kaplan runner. The 3D
computational domain is bounded upstream by the
power plant inlet while the annular outlet section is
conventionally considered at the reference plane of
the Kaplan runner.
An important step in designing and/or optimizing
the runner blades is the determination of both axial
and tangential velocity components at runner inlet for
the whole operating range.
Due to its specific geometry, the flow upstream
the Kaplan runner must be considered full threedimensional.
No simplified geometrical assumptions
are made in this paper, such as employing the geometrical
periodicity of the guide vanes. However,
we assume the flow to be steady, since unsteadiness
is weak in strongly accelerated flows upstream the
hydraulic turbine runner.
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| ISSN 1224-6077 |
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2005
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| Kaplan turbine, swirling flow |
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No file uploaded
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MUNTEAN Sebastian
,
BALINT Daniel
,
SUSAN-RESIGA Romeo
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BERNAD Sandor
,
ANTON Ioan
,
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National Journal Article
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http://ms.utt.ro/accord-fluid/workshop2005/docs/11_Muntean1.pdf
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Numerical Simulation and Parallel Computing Laboratory
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| Institution: |
ARFT
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