Application of a laser-Doppler anemometry for the study of unsteady flow structure in a model micro-hydro turbine

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Abstract

Current work deals with an LDA characterization of the velocity distributions and pressure pulsation maps in an axisymmetric draft tube for the flow conditions corresponding to wide range of the operating regimes of the micro-hydro turbine unit. For the detailed analysis of the velocity profiles, three characteristic regimes corresponding to part-load regime with precessing vortex core formation, best efficiency regime and overload regime of hydro turbine operation were selected. To capture spatial characteristics of the unsteady flow for part-load regime a phase averaging procedure for the LDA data has been employed.

Original languageEnglish
Article number012068
JournalJournal of Physics: Conference Series
Volume1421
Issue number1
DOIs
Publication statusPublished - 30 Dec 2019
Event15th International Conference on Optical Methods of Flow Investigation, OMFI 2019 - Moscow, Russian Federation
Duration: 24 Jun 201928 Jun 2019

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