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Title: A Numerical Study Of The 3d Swirling Flow Upstream The Kaplan Turbine Runner At Off-Design Operating Conditions
Published In: Scientific Bulletin of the “Politehnica” University of Timisoara, Transactions on Mechanics, ISSN 1224-6077, Tom 50(64), pp. 97-104
Description: 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.
ISSN:ISSN 1224-6077
Publication year: 2005
Keywords:Kaplan turbine, swirling flow
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Authors: MUNTEAN Sebastian , BALINT Daniel , SUSAN-RESIGA Romeo , BERNAD Sandor , ANTON Ioan ,
Type: National Journal Article
Laboratory: Numerical Simulation and Parallel Computing Laboratory
Institution: ARFT