A Study of Transient Flow Modes in a Hydraulic Turbine Draft Tube Model
- Autores: Litvinov I.V.1, Mitryakov A.S.1, Shtork S.I.1
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Afiliações:
- Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
- Edição: Volume 50, Nº 1 (2016)
- Páginas: 1-5
- Seção: Hydrotechnical Construction
- URL: https://journal-vniispk.ru/1570-145X/article/view/245036
- DOI: https://doi.org/10.1007/s10749-016-0650-6
- ID: 245036
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Resumo
Results are presented of experiments carried out using an air model of a hydraulic turbine draft tube. These included velocity measurements in the conical part of the tube using a laser-Doppler anemometer and measurement of pressure pulsations using acoustic sensors (microphones). It is shown that a system of two runner vane cascades can be used to simulate a velocity distribution that resembles the distributions downstream of a runner under full-scale conditions. Experiments show that modes involving the formation of a vortex rope occur in the region of significant hydroelectric generating unit underload. Analysis of spectra, the cross-correlation function, and mean velocity distributions confirmed the vortex nature of the generation of powerful pressure pulsations in the draft tube cone.
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Sobre autores
I. Litvinov
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Autor responsável pela correspondência
Email: litvinov@itp.nsc.ru
Rússia, Novosibirsk
A. Mitryakov
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Email: litvinov@itp.nsc.ru
Rússia, Novosibirsk
S. Shtork
Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk State University
Email: litvinov@itp.nsc.ru
Rússia, Novosibirsk
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